chore: release v1.2.0

* fix(ffmpeg): require bundled ffprobe directory

* ci(build): upload artifacts on PR

* fix(download): allow embed thumbnail on macos

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,37 @@
+name: Bug Report
+description: Report a problem or regression
+title: "[Bug]: "
+labels:
+  - bug
+body:
+  - type: input
+    id: app_version
+    attributes:
+      label: App version
+      description: The VidBee version (e.g., 1.2.3)
+      placeholder: 1.2.3
+    validations:
+      required: true
+  - type: input
+    id: os_version
+    attributes:
+      label: OS version
+      description: Your operating system and version (e.g., macOS 14.2, Windows 11 23H2)
+      placeholder: macOS 14.2
+    validations:
+      required: true
+  - type: textarea
+    id: actual
+    attributes:
+      label: Observed behavior
+      placeholder: What actually happened
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Logs or screenshots
+      description: Paste relevant logs or add screenshots
+      placeholder: Attach files or paste logs here
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,38 @@
+name: Feature Request
+description: Suggest an idea or improvement
+title: "[Feature]: "
+labels:
+  - enhancement
+body:
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem to solve
+      description: What problem are you trying to solve?
+      placeholder: I want to...
+    validations:
+      required: true
+  - type: textarea
+    id: proposal
+    attributes:
+      label: Proposed solution
+      description: Describe the feature or change you want
+      placeholder: It would be great if...
+    validations:
+      required: true
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives considered
+      description: Other solutions or workarounds you considered
+      placeholder: I tried...
+    validations:
+      required: false
+  - type: textarea
+    id: extra
+    attributes:
+      label: Additional context
+      description: Add any other context or screenshots
+      placeholder: Links, screenshots, or related issues
+    validations:
+      required: false

.github/workflows/build.yml

@@ -8,6 +8,17 @@ on:
         type: boolean
         default: false
         description: 'Whether to upload build artifacts'
+    secrets:
+      MAC_CERT_P12_BASE64:
+        required: false
+      MAC_CERT_P12_PASSWORD:
+        required: false
+      APPLE_API_KEY_ID:
+        required: false
+      APPLE_API_ISSUER:
+        required: false
+      APPLE_API_KEY_P8_BASE64:
+        required: false
 
 jobs:
   build:
@@ -22,16 +33,16 @@ jobs:
             ytdlp_output: yt-dlp.exe
             ffmpeg_url: https://github.com/yt-dlp/FFmpeg-Builds/releases/latest/download/ffmpeg-master-latest-win64-gpl.zip
             ffmpeg_inner_path: ffmpeg-master-latest-win64-gpl\bin\ffmpeg.exe
-            ffmpeg_output: ffmpeg.exe
+            ffprobe_inner_path: ffmpeg-master-latest-win64-gpl\bin\ffprobe.exe
           - platform: macos
             os: macos-latest
             build_script: pnpm run build:mac
             ytdlp_asset: yt-dlp_macos
             ytdlp_output: yt-dlp_macos
-            ffmpeg_arm_url: https://github.com/eko5624/mpv-mac/releases/download/2025-10-25/ffmpeg-arm64-defd5f3f64.zip
-            ffmpeg_x86_url: https://github.com/eko5624/mpv-mac/releases/download/2025-10-25/ffmpeg-x86_64-defd5f3f64.zip
+            ffmpeg_arm_url: https://github.com/eko5624/mpv-mac/releases/download/2026-01-12/ffmpeg-arm64-96e8f3b8cc.zip
+            ffmpeg_x86_url: https://github.com/eko5624/mpv-mac/releases/download/2026-01-12/ffmpeg-x86_64-96e8f3b8cc.zip
             ffmpeg_inner_path: ffmpeg/ffmpeg
-            ffmpeg_output: ffmpeg_macos
+            ffprobe_inner_path: ffmpeg/ffprobe
           - platform: linux
             os: ubuntu-latest
             build_script: pnpm run build:linux
@@ -39,7 +50,7 @@ jobs:
             ytdlp_output: yt-dlp_linux
             ffmpeg_url: https://github.com/yt-dlp/FFmpeg-Builds/releases/latest/download/ffmpeg-master-latest-linux64-gpl.tar.xz
             ffmpeg_inner_path: ffmpeg-master-latest-linux64-gpl/bin/ffmpeg
-            ffmpeg_output: ffmpeg_linux
+            ffprobe_inner_path: ffmpeg-master-latest-linux64-gpl/bin/ffprobe
     steps:
       - name: Check out Git repository
         uses: actions/checkout@v4
@@ -66,24 +77,45 @@ jobs:
           Invoke-WebRequest -Uri $ffmpegUrl -OutFile ffmpeg.zip
           Expand-Archive ffmpeg.zip -DestinationPath ffmpeg -Force
           $source = Join-Path 'ffmpeg' '${{ matrix.ffmpeg_inner_path }}'
-          $destination = Join-Path 'resources' '${{ matrix.ffmpeg_output }}'
-          Copy-Item -Path $source -Destination $destination -Force
+          $ffprobeSource = Join-Path 'ffmpeg' '${{ matrix.ffprobe_inner_path }}'
+          $destinationDir = Join-Path 'resources' 'ffmpeg'
+          New-Item -ItemType Directory -Path $destinationDir -Force | Out-Null
+          Copy-Item -Path $source -Destination (Join-Path $destinationDir 'ffmpeg.exe') -Force
+          Copy-Item -Path $ffprobeSource -Destination (Join-Path $destinationDir 'ffprobe.exe') -Force
+          Remove-Item ffmpeg.zip -Force
+          Remove-Item ffmpeg -Recurse -Force
 
       - name: Download ffmpeg binary (macOS)
         if: matrix.platform == 'macos'
         shell: bash
         env:
-          FFMPEG_OUTPUT: ${{ matrix.ffmpeg_output }}
+          FFMPEG_OUTPUT: ffmpeg
+          FFPROBE_OUTPUT: ffprobe
         run: |
           set -euo pipefail
-          curl -L "${{ matrix.ffmpeg_arm_url }}" -o ffmpeg-arm.zip
+          curl -fL --retry 3 --retry-delay 2 --retry-connrefused "${{ matrix.ffmpeg_arm_url }}" -o ffmpeg-arm.zip
           unzip -q ffmpeg-arm.zip -d ffmpeg-arm
 
-          curl -L "${{ matrix.ffmpeg_x86_url }}" -o ffmpeg-x86.zip
+          curl -fL --retry 3 --retry-delay 2 --retry-connrefused "${{ matrix.ffmpeg_x86_url }}" -o ffmpeg-x86.zip
           unzip -q ffmpeg-x86.zip -d ffmpeg-x86
 
           arm_bin="ffmpeg-arm/${{ matrix.ffmpeg_inner_path }}"
           x86_bin="ffmpeg-x86/${{ matrix.ffmpeg_inner_path }}"
+          arm_probe="ffmpeg-arm/${{ matrix.ffprobe_inner_path }}"
+          x86_probe="ffmpeg-x86/${{ matrix.ffprobe_inner_path }}"
+
+          if [[ ! -f "$arm_bin" ]]; then
+            arm_bin="$(find ffmpeg-arm -type f -name ffmpeg -print -quit)"
+          fi
+          if [[ ! -f "$x86_bin" ]]; then
+            x86_bin="$(find ffmpeg-x86 -type f -name ffmpeg -print -quit)"
+          fi
+          if [[ ! -f "$arm_probe" ]]; then
+            arm_probe="$(find ffmpeg-arm -type f -name ffprobe -print -quit)"
+          fi
+          if [[ ! -f "$x86_probe" ]]; then
+            x86_probe="$(find ffmpeg-x86 -type f -name ffprobe -print -quit)"
+          fi
 
           if [[ ! -f "$arm_bin" ]]; then
             echo "::error::Missing arm64 ffmpeg binary at $arm_bin"
@@ -93,9 +125,19 @@ jobs:
             echo "::error::Missing x86_64 ffmpeg binary at $x86_bin"
             exit 1
           fi
+          if [[ ! -f "$arm_probe" ]]; then
+            echo "::error::Missing arm64 ffprobe binary at $arm_probe"
+            exit 1
+          fi
+          if [[ ! -f "$x86_probe" ]]; then
+            echo "::error::Missing x86_64 ffprobe binary at $x86_probe"
+            exit 1
+          fi
 
-          lipo -create "$arm_bin" "$x86_bin" -output "resources/$FFMPEG_OUTPUT"
-          chmod +x "resources/$FFMPEG_OUTPUT"
+          mkdir -p resources/ffmpeg
+          lipo -create "$arm_bin" "$x86_bin" -output "resources/ffmpeg/$FFMPEG_OUTPUT"
+          lipo -create "$arm_probe" "$x86_probe" -output "resources/ffmpeg/$FFPROBE_OUTPUT"
+          chmod +x "resources/ffmpeg/$FFMPEG_OUTPUT" "resources/ffmpeg/$FFPROBE_OUTPUT"
           rm -rf ffmpeg-arm ffmpeg-x86 ffmpeg-arm.zip ffmpeg-x86.zip
 
       - name: Download ffmpeg binary (Linux)
@@ -103,16 +145,23 @@ jobs:
         shell: bash
         run: |
           set -euo pipefail
-          curl -L "${{ matrix.ffmpeg_url }}" -o ffmpeg.tar.xz
+          curl -fL --retry 3 --retry-delay 2 --retry-connrefused "${{ matrix.ffmpeg_url }}" -o ffmpeg.tar.xz
+          if ! tar -tf ffmpeg.tar.xz >/dev/null 2>&1; then
+            echo "::error::Downloaded ffmpeg archive is not a valid tar.xz"
+            exit 1
+          fi
           mkdir ffmpeg
           tar -xf ffmpeg.tar.xz -C ffmpeg
-          cp "ffmpeg/${{ matrix.ffmpeg_inner_path }}" "resources/${{ matrix.ffmpeg_output }}"
-          chmod +x "resources/${{ matrix.ffmpeg_output }}"
+          mkdir -p resources/ffmpeg
+          cp "ffmpeg/${{ matrix.ffmpeg_inner_path }}" "resources/ffmpeg/ffmpeg"
+          cp "ffmpeg/${{ matrix.ffprobe_inner_path }}" "resources/ffmpeg/ffprobe"
+          chmod +x "resources/ffmpeg/ffmpeg" "resources/ffmpeg/ffprobe"
+          rm -rf ffmpeg.tar.xz ffmpeg
 
       - name: Download yt-dlp binary
         shell: bash
         run: |
-          curl -L "https://github.com/yt-dlp/yt-dlp/releases/latest/download/${{ matrix.ytdlp_asset }}" -o "resources/${{ matrix.ytdlp_output }}"
+          curl -fL --retry 3 --retry-delay 2 --retry-connrefused "https://github.com/yt-dlp/yt-dlp/releases/latest/download/${{ matrix.ytdlp_asset }}" -o "resources/${{ matrix.ytdlp_output }}"
           if [[ "${{ matrix.platform }}" == "linux" ]] || [[ "${{ matrix.platform }}" == "macos" ]]; then
             chmod +x "resources/${{ matrix.ytdlp_output }}"
           fi
@@ -120,14 +169,100 @@ jobs:
       - name: Lint and format check
         run: pnpm run check && pnpm run typecheck
 
+      - name: Setup macOS signing
+        if: matrix.platform == 'macos'
+        shell: bash
+        env:
+          MAC_CERT_P12_BASE64: ${{ secrets.MAC_CERT_P12_BASE64 }}
+          MAC_CERT_P12_PASSWORD: ${{ secrets.MAC_CERT_P12_PASSWORD }}
+          APPLE_API_KEY_P8_BASE64: ${{ secrets.APPLE_API_KEY_P8_BASE64 }}
+          APPLE_API_KEY_ID: ${{ secrets.APPLE_API_KEY_ID }}
+          APPLE_API_ISSUER: ${{ secrets.APPLE_API_ISSUER }}
+        run: |
+          set -euo pipefail
+          echo "SIGNING_AVAILABLE=false" >> "$GITHUB_ENV"
+
+          # Check if all required secrets are present
+          if [[ -z "$MAC_CERT_P12_BASE64" ]] || [[ -z "$MAC_CERT_P12_PASSWORD" ]] || \
+             [[ -z "$APPLE_API_KEY_ID" ]] || [[ -z "$APPLE_API_ISSUER" ]] || \
+             [[ -z "$APPLE_API_KEY_P8_BASE64" ]]; then
+            echo "::notice::macOS signing secrets not available, skipping code signing setup"
+            exit 0
+          fi
+
+          CERT_PATH="$RUNNER_TEMP/mac_cert.p12"
+          KEYCHAIN_PATH="$RUNNER_TEMP/build.keychain"
+          API_KEY_PATH="$RUNNER_TEMP/AuthKey.p8"
+
+          echo "$MAC_CERT_P12_BASE64" | base64 --decode > "$CERT_PATH"
+          echo "$APPLE_API_KEY_P8_BASE64" | base64 --decode > "$API_KEY_PATH"
+
+          security create-keychain -p "$MAC_CERT_P12_PASSWORD" "$KEYCHAIN_PATH"
+          security set-keychain-settings -lut 21600 "$KEYCHAIN_PATH"
+          security unlock-keychain -p "$MAC_CERT_P12_PASSWORD" "$KEYCHAIN_PATH"
+          security import "$CERT_PATH" -k "$KEYCHAIN_PATH" -P "$MAC_CERT_P12_PASSWORD" -T /usr/bin/codesign -T /usr/bin/productbuild
+          security list-keychain -d user -s "$KEYCHAIN_PATH"
+          security set-key-partition-list -S apple-tool:,apple:,codesign: -s -k "$MAC_CERT_P12_PASSWORD" "$KEYCHAIN_PATH"
+
+          echo "CSC_KEYCHAIN=$KEYCHAIN_PATH" >> "$GITHUB_ENV"
+          echo "CSC_KEY_PASSWORD=$MAC_CERT_P12_PASSWORD" >> "$GITHUB_ENV"
+          echo "APPLE_API_KEY=$API_KEY_PATH" >> "$GITHUB_ENV"
+          echo "APPLE_API_KEY_ID=$APPLE_API_KEY_ID" >> "$GITHUB_ENV"
+          echo "APPLE_API_ISSUER=$APPLE_API_ISSUER" >> "$GITHUB_ENV"
+          echo "SIGNING_AVAILABLE=true" >> "$GITHUB_ENV"
+
       - name: Build application
         run: ${{ matrix.build_script }}
 
+      - name: Verify macOS codesign and notarization
+        if: matrix.platform == 'macos' && env.SIGNING_AVAILABLE == 'true'
+        shell: bash
+        run: |
+          set -euo pipefail
+          apps_found=0
+          while IFS= read -r app; do
+            apps_found=1
+            echo "Verifying codesign for $app"
+            codesign --verify --deep --strict --verbose=2 "$app"
+            spctl -a -t exec -vv "$app"
+            echo "Validating notarization ticket for $app"
+            xcrun stapler validate "$app"
+          done < <(find dist -type d -name "*.app" -prune -print)
+
+          if [[ "$apps_found" -eq 0 ]]; then
+            echo "::error::No .app bundles found in dist"
+            exit 1
+          fi
+
+          dmgs_found=0
+          while IFS= read -r dmg; do
+            dmgs_found=1
+            echo "Submitting DMG for notarization: $dmg"
+            xcrun notarytool submit "$dmg" --key "$APPLE_API_KEY" --key-id "$APPLE_API_KEY_ID" --issuer "$APPLE_API_ISSUER" --wait
+            echo "Stapling notarization ticket for $dmg"
+            xcrun stapler staple "$dmg"
+            echo "Validating notarization ticket for $dmg"
+            xcrun stapler validate "$dmg"
+          done < <(find dist -type f -name "*.dmg" -print)
+
+          if [[ "$dmgs_found" -eq 0 ]]; then
+            echo "::notice::No DMG artifacts found to validate"
+          fi
+
       - name: Upload build artifacts
         if: inputs.upload_artifacts == true
         uses: actions/upload-artifact@v4
         with:
           name: dist-${{ matrix.os }}
-          path: dist/
+          path: |
+            dist/*.exe
+            dist/*.zip
+            dist/*.dmg
+            dist/*.AppImage
+            dist/*.snap
+            dist/*.deb
+            dist/*.rpm
+            dist/*.tar.gz
+            dist/*.yml
+            dist/*.blockmap
           retention-days: 1
-

.github/workflows/ci.yml

@@ -7,3 +7,5 @@ on:
 jobs:
   build:
     uses: ./.github/workflows/build.yml
+    with:
+      upload_artifacts: true

.github/workflows/extension-publish.yml

@@ -0,0 +1,84 @@
+name: Publish Extension
+
+on:
+  push:
+    branches: [ main ]
+    paths:
+      - extension/package.json
+
+jobs:
+  detect-version:
+    runs-on: ubuntu-latest
+    outputs:
+      changed: ${{ steps.version_check.outputs.changed }}
+      current_version: ${{ steps.version_check.outputs.current_version }}
+      previous_version: ${{ steps.version_check.outputs.previous_version }}
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Check if extension version changed
+        id: version_check
+        shell: bash
+        run: |
+          set -euo pipefail
+          before_sha="${{ github.event.before }}"
+          current_version=$(node -e "const fs = require('fs'); const v = JSON.parse(fs.readFileSync('extension/package.json', 'utf8')).version; process.stdout.write(v);")
+          previous_version=""
+          if git cat-file -e "${before_sha}:extension/package.json" 2>/dev/null; then
+            previous_version=$(git show "${before_sha}:extension/package.json" | node -e "let data=''; process.stdin.on('data', d => data += d); process.stdin.on('end', () => { const v = JSON.parse(data).version; process.stdout.write(v); });")
+          fi
+
+          echo "current_version=${current_version}" >> "$GITHUB_OUTPUT"
+          echo "previous_version=${previous_version}" >> "$GITHUB_OUTPUT"
+
+          if [[ -n "${previous_version}" && "${current_version}" == "${previous_version}" ]]; then
+            echo "changed=false" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          echo "changed=true" >> "$GITHUB_OUTPUT"
+
+  submit:
+    needs: detect-version
+    if: needs.detect-version.outputs.changed == 'true'
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: extension
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@v4
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 8
+
+      - name: Install Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: 'pnpm'
+          cache-dependency-path: extension/pnpm-lock.yaml
+
+      - name: Install dependencies
+        run: pnpm install
+
+      - name: Zip extensions
+        run: |
+          pnpm zip
+
+      - name: Submit to stores
+        run: |
+          pnpm wxt submit \
+            --chrome-zip .output/*-chrome.zip
+        env:
+          CHROME_EXTENSION_ID: ${{ secrets.CHROME_EXTENSION_ID }}
+          CHROME_CLIENT_ID: ${{ secrets.CHROME_CLIENT_ID }}
+          CHROME_CLIENT_SECRET: ${{ secrets.CHROME_CLIENT_SECRET }}
+          CHROME_REFRESH_TOKEN: ${{ secrets.CHROME_REFRESH_TOKEN }}
+          CHROME_PUBLISH_TARGET: "default"
+          CHROME_SKIP_SUBMIT_REVIEW: false

.github/workflows/release.yml

@@ -10,6 +10,7 @@ jobs:
     uses: ./.github/workflows/build.yml
     with:
       upload_artifacts: true
+    secrets: inherit
 
   release:
     needs: [build]
@@ -42,3 +43,9 @@ jobs:
             dist/*.blockmap
         env:
           GITHUB_TOKEN: ${{ secrets.ACCESS_TOKEN }}
+
+      - name: Notify Cloudflare Pages
+        env:
+          CLOUDFLARE_WEBHOOK_URL: ${{ secrets.CLOUDFLARE_WEBHOOK_URL }}
+        run: |
+          curl -X POST "$CLOUDFLARE_WEBHOOK_URL"

.gitignore

@@ -1,7 +1,9 @@
 node_modules
-dist
+/dist
 out
+.conductor/
+.wxt
+.output
 .DS_Store
 .eslintcache
 *.log*
-

.vscode/settings.json

@@ -25,5 +25,8 @@
     ["cn\\(([^)]*)\\)", "(?:'|\"|`)([^']*)(?:'|\"|`)"]
   ],
   "i18n-ally.localesPaths": ["src/renderer/src/locales"],
-  "i18n-ally.keystyle": "nested"
+  "i18n-ally.keystyle": "nested",
+  "[css]": {
+    "editor.defaultFormatter": "biomejs.biome"
+  }
 }

AGENTS.md

@@ -1,5 +1,7 @@
 1. use pnpm instead of npm
 2. use pnpm run check after tasks to check code
-3. Support i18n, only translate the English version of en.json
+3. Support i18n. When writing business logic, initially only translate the English version of en.json
 4. use English for comments&console
 5. Follow the ✅ KISS (Keep It Simple, Stupid) & ✅ YAGNI (You Aren't Gonna Need It) principles
+6. Use Conventional Commits format for commit messages: `type(scope): subject`. Common types: feat, fix, docs, style, refactor, test, chore, perf, ci, build, revert. PR titles should also follow this format.
+7. If there is an error when running `pnpm run check:i18n`, please complete the missing corresponding translation files and fields. Ensure the translation is done into the corresponding language, rather than directly copying the English version.

CONTRIBUTING.md

@@ -58,7 +58,7 @@ src/
 - Build production bundles with `pnpm build`.
 - Create platform-specific artifacts with `pnpm build:win`, `pnpm build:mac`, or `pnpm build:linux`.
 - Use `pnpm build:unpack` to generate unpacked directories under `dist/` for manual inspection.
-- Bundle platform binaries of `yt-dlp` and `ffmpeg` under `resources/` (or set `YTDLP_PATH`/`FFMPEG_PATH`) before packaging so merges and audio extraction work out of the box.
+- Bundle platform binaries of `yt-dlp` and `ffmpeg/ffprobe` under `resources/ffmpeg/` (or set `YTDLP_PATH`/`FFMPEG_PATH`) before packaging so merges and audio extraction work out of the box.
 
 ## Working on Changes
 - Keep each pull request focused on a single problem or feature.

README.md

@@ -5,11 +5,12 @@
 
   <h3>VidBee</h3>
   <p>
-    <a href="https://github.com/nexmoe/VidBee/stargazers"><img src="https://img.shields.io/github/stars/nexmoe/VidBee?color=ffcb47&labelColor=black&style=flat-square&logo=github&label=Stars" /></a>
-    <a href="https://github.com/nexmoe/VidBee/graphs/contributors"><img src="https://img.shields.io/github/contributors/nexmoe/VidBee?style=flat-square&logo=github&label=Contributors&labelColor=black" /></a>
-    <a href="https://github.com/nexmoe/VidBee/releases"><img src="https://img.shields.io/github/downloads/nexmoe/VidBee/total?color=369eff&labelColor=black&logo=github&style=flat-square&label=Downloads" /></a>
-    <a href="https://github.com/nexmoe/VidBee/releases/latest"><img src="https://img.shields.io/github/v/release/nexmoe/VidBee?color=369eff&labelColor=black&logo=github&style=flat-square&label=Latest%20Release" /></a>
-    <a href="https://x.com/intent/follow?screen_name=nexmoex"><img src="https://img.shields.io/badge/Follow-blue?color=1d9bf0&logo=x&labelColor=black&style=flat-square" /></a>
+    <a href="https://github.com/nexmoe/VidBee/stargazers"><img src="https://img.shields.io/github/stars/nexmoe/VidBee?color=ffcb47&labelColor=black&logo=github&label=Stars" /></a>
+    <a href="https://github.com/nexmoe/VidBee/graphs/contributors"><img src="https://img.shields.io/github/contributors/nexmoe/VidBee?ogo=github&label=Contributors&labelColor=black" /></a>
+    <a href="https://github.com/nexmoe/VidBee/releases"><img src="https://img.shields.io/github/downloads/nexmoe/VidBee/total?color=369eff&labelColor=black&logo=github&label=Downloads" /></a>
+    <a href="https://github.com/nexmoe/VidBee/releases/latest"><img src="https://img.shields.io/github/v/release/nexmoe/VidBee?color=369eff&labelColor=black&logo=github&label=Latest%20Release" /></a>
+    <a href="https://x.com/intent/follow?screen_name=nexmoex"><img src="https://img.shields.io/badge/Follow-blue?color=1d9bf0&logo=x&labelColor=black" /></a>
+    <a href="https://deepwiki.com/nexmoe/VidBee"><img src="https://deepwiki.com/badge.svg" alt="Ask DeepWiki"></a>
     <br />
     <br />
     <a href="https://github.com/nexmoe/VidBee/releases/latest" target="_blank"><img src="screenshots/main-interface.png" alt="VidBee Desktop" width="46%"/></a>
@@ -19,7 +20,7 @@
   </p>
 </div>
 
-VidBee is a modern, open-source video downloader that lets you download videos and audios from 1000+ websites worldwide. Built with Electron and powered by yt-dlp, VidBee offers a clean, intuitive interface with powerful features for all your downloading needs.
+VidBee is a modern, open-source video downloader that lets you download videos and audios from 1000+ websites worldwide. Built with Electron and powered by yt-dlp, VidBee offers a clean, intuitive interface with powerful features for all your downloading needs, including RSS auto-download automation that automatically subscribes to feeds and downloads new videos from your favorite creators in the background.
 
 ## 👋🏻 Getting Started
 
@@ -27,11 +28,7 @@ VidBee is currently under active development, and feedback is welcome for any [i
 
 Feel free to try it using the following methods:
 
-| Operating System | Source                                                                                                                                                                                                                                                                                                                                                                                                                                |
-| :--------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
-| Windows          | <a href="https://github.com/nexmoe/VidBee/releases/latest" target="_blank"><img src="https://img.shields.io/badge/Download-Windows-0078D6?style=flat-square&logo=windows&logoColor=white&labelColor=black" height="55"/></a>                                                                                                                                                                                                              |
-| macOS            | <a href="https://github.com/nexmoe/VidBee/releases/latest" target="_blank"><img src="https://img.shields.io/badge/Download-macOS-000000?style=flat-square&logo=apple&logoColor=white&labelColor=black" height="55"/></a>                                                                                                                                                                                                              |
-| Linux            | <a href="https://github.com/nexmoe/VidBee/releases/latest" target="_blank"><img src="https://img.shields.io/badge/Download-Linux-FCC624?style=flat-square&logo=linux&logoColor=white&labelColor=black" height="55"/></a>                                                                                                                                                                                                                |
+<a href="https://vidbee.org/download/" target="_blank"><img src="https://img.shields.io/badge/Download-VidBee-369eff?style=flat-square&logo=github&logoColor=white&labelColor=black" height="55"/></a>
 
 ### 🍎 macOS Installation Notes
 
@@ -43,6 +40,35 @@ xattr -rd com.apple.quarantine /Applications/VidBee.app/
 
 This command removes the quarantine attribute that macOS applies to applications downloaded from the internet, allowing VidBee to run properly without the "file is damaged" error.
 
+### 🌐 Browser Script (Quick Download)
+
+For a more convenient downloading experience, you can install the VidBee browser script to add a quick download button directly on supported video websites.
+
+![VidBee Browser Script](screenshots/browser-script.png)
+
+**Installation:**
+
+1. Install a userscript manager extension:
+   - [Tampermonkey](https://www.tampermonkey.net/) (Recommended)
+   - [Violentmonkey](https://violentmonkey.github.io/)
+   - [Greasemonkey](https://www.greasespot.net/)
+
+2. Install the VidBee Quick Download script:
+   - [Install from Greasy Fork](https://greasyfork.org/zh-CN/scripts/559595-vidbee-quick-download)
+
+**Usage:**
+
+After installation, when you visit supported video websites (YouTube, Bilibili, TikTok, Instagram, Twitter, etc.), a download button will appear on the page. Click the button to quickly send the video URL to VidBee desktop app for downloading.
+
+**Supported Sites:**
+
+The script works on popular video platforms including:
+
+- YouTube, Bilibili, TikTok, Vimeo, Dailymotion
+- Twitch, Twitter/X, Instagram, Facebook
+- Reddit, SoundCloud, Niconico, Kick
+- Bandcamp, Mixcloud, and more
+
 > [!IMPORTANT]
 >
 > **Star Us**, You will receive all release notifications from GitHub without any delay ~
@@ -70,6 +96,10 @@ Modern, clean interface with intuitive operations. One-click pause/resume/retry,
 
 ![VidBee Download Queue](screenshots/download-queue.png)
 
+### 📡 RSS Auto Download
+
+Automatically subscribe to RSS feeds and auto-download new videos in the background from your favorite creators across YouTube, TikTok, and more. Set up RSS subscriptions once, and VidBee will automatically download new uploads without manual intervention, perfect for keeping up with your favorite channels and creators.
+
 ## 🌐 Supported Sites
 
 VidBee supports hundreds of video and audio platforms through yt-dlp. Here are the most popular platforms:

biome.json

@@ -39,7 +39,18 @@
   },
   "files": {
     "ignoreUnknown": false,
-    "includes": ["**/*.ts", "**/*.tsx", "**/*.js", "**/*.jsx", "**/*.json"]
+    "includes": [
+      "**/*.ts",
+      "**/*.tsx",
+      "**/*.js",
+      "**/*.jsx",
+      "**/*.json",
+      "!monkey/dist",
+      "!dist",
+      "!out",
+      "!build"
+    ],
+    "experimentalScannerIgnores": ["monkey/dist/**", "dist/**", "out/**", "build/**"]
   },
   "vcs": {
     "enabled": true,

build/after-pack.cjs

@@ -0,0 +1,63 @@
+const { execFileSync } = require('node:child_process')
+const fs = require('node:fs')
+const path = require('node:path')
+
+const BINARIES = [
+  'yt-dlp_macos',
+  path.join('ffmpeg', 'ffmpeg'),
+  path.join('ffmpeg', 'ffprobe'),
+  'deno'
+]
+
+const findAppBundle = (appOutDir) => {
+  const entries = fs.readdirSync(appOutDir)
+  const app = entries.find((entry) => entry.endsWith('.app'))
+  return app ? path.join(appOutDir, app) : null
+}
+
+const resolveSigningIdentity = () =>
+  process.env.CSC_NAME || process.env.APPLE_SIGNING_IDENTITY || '-'
+
+const signBinary = (targetPath, entitlementsPath) => {
+  const identity = resolveSigningIdentity()
+  const args = ['--force', '--sign', identity, '--entitlements', entitlementsPath]
+
+  if (identity !== '-') {
+    args.push('--options', 'runtime', '--timestamp')
+  }
+
+  args.push(targetPath)
+  execFileSync('codesign', args, { stdio: 'inherit' })
+}
+
+exports.default = async function afterPack(context) {
+  if (context.electronPlatformName !== 'darwin') {
+    return
+  }
+
+  const appBundle = findAppBundle(context.appOutDir)
+  if (!appBundle) {
+    console.warn('afterPack: No .app bundle found, skipping tool signing.')
+    return
+  }
+
+  const resourcesPath = path.join(
+    appBundle,
+    'Contents',
+    'Resources',
+    'app.asar.unpacked',
+    'resources'
+  )
+
+  const entitlementsPath = path.resolve(__dirname, 'entitlements.mac.plist')
+
+  for (const binary of BINARIES) {
+    const targetPath = path.join(resourcesPath, binary)
+    if (!fs.existsSync(targetPath)) {
+      console.warn(`afterPack: Missing ${binary}, skipping.`)
+      continue
+    }
+    console.log(`afterPack: Signing ${binary} with entitlements.`)
+    signBinary(targetPath, entitlementsPath)
+  }
+}

build/entitlements.mac.plist

@@ -8,5 +8,7 @@
     <true/>
     <key>com.apple.security.cs.allow-dyld-environment-variables</key>
     <true/>
+    <key>com.apple.security.cs.disable-library-validation</key>
+    <true/>
   </dict>
 </plist>

conductor.json

@@ -0,0 +1,6 @@
+{
+  "scripts": {
+    "setup": "rm -rf resources && cp -r $CONDUCTOR_ROOT_PATH/resources resources && pnpm install",
+    "run": "pnpm run dev"
+  }
+}

electron-builder.yml

@@ -2,13 +2,23 @@ appId: com.vidbee
 productName: VidBee
 directories:
   buildResources: build
+afterPack: build/after-pack.cjs
+protocols:
+  - name: VidBee
+    schemes:
+      - vidbee
 files:
   - '!**/.vscode/*'
+  - '!**/.context/**'
+  - '!**/.github/**'
   - '!src/*'
   - '!electron.vite.config.{js,ts,mjs,cjs}'
   - '!{.eslintcache,eslint.config.mjs,dev-app-update.yml,CHANGELOG.md}'
   - '!{.env,.env.*,.npmrc,pnpm-lock.yaml}'
   - '!{tsconfig.json,tsconfig.node.json,tsconfig.web.json}'
+  - '!extension/**'
+  - '!monkey/**'
+  - '!screenshots/**'
 asarUnpack:
   - resources/**
 win:
@@ -19,8 +29,10 @@ nsis:
   uninstallDisplayName: ${productName}
   createDesktopShortcut: always
 mac:
+  hardenedRuntime: true
+  entitlements: build/entitlements.mac.plist
   entitlementsInherit: build/entitlements.mac.plist
-  notarize: false
+  notarize: true
   artifactName: ${name}-${version}-${arch}.${ext}
   target:
     - target: zip
@@ -45,3 +57,5 @@ publish:
   url: https://github.com/nexmoe/vidbee/releases/latest/download
 electronDownload:
   mirror: https://npmmirror.com/mirrors/electron/
+electronLanguages:
+  - en

extension/.gitignore

@@ -0,0 +1,29 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+.output
+stats.html
+stats-*.json
+.wxt
+web-ext.config.ts
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+.env
+.env.*

extension/README.md

@@ -0,0 +1,54 @@
+# VidBee Video Downloader Extension
+
+VidBee Video Downloader is a lightweight browser companion for the VidBee desktop app. It detects the video on your current tab, shows the available formats, and hands the URL to VidBee so the download happens in the desktop app instead of your browser.
+
+## Why install it?
+
+- **One-click handoff:** Send the current video page to VidBee without copy-pasting links.
+- **See formats before downloading:** Preview resolutions, file sizes, and audio-only options in the popup.
+- **More reliable downloads:** VidBee handles large files and multi-format downloads better than most browsers.
+- **Works on 1,000+ sites:** The extension uses the same site support as the VidBee app.
+
+## What it does
+
+1. Reads the active tab URL when you open the popup.
+2. Asks the VidBee desktop app (running locally) to analyze the video.
+3. Displays the formats it finds and lets you open VidBee to download.
+
+## Requirements
+
+- VidBee desktop app installed.
+- VidBee running while you use the extension.
+
+## How to use
+
+1. Open a supported video page.
+2. Click the VidBee extension icon.
+3. Review available formats.
+4. Click **Download with VidBee** to start the download in the desktop app.
+
+## Development
+
+```bash
+pnpm install
+pnpm dev
+```
+
+Build or package:
+
+```bash
+pnpm build
+pnpm zip
+```
+
+Firefox builds:
+
+```bash
+pnpm dev:firefox
+pnpm build:firefox
+pnpm zip:firefox
+```
+
+## Notes on privacy
+
+The extension only sends the current tab URL to the local VidBee app on `127.0.0.1` and stores temporary results in browser storage for faster reloads.

extension/assets/content.css

@@ -0,0 +1,163 @@
+.vidbee-download-container {
+  position: fixed;
+  bottom: 16px;
+  right: 16px;
+  z-index: 9999;
+  transition: all 0.2s ease;
+  overflow: visible;
+}
+
+.vidbee-download-container.vidbee-hidden {
+  opacity: 0;
+  pointer-events: none;
+  transform: scale(0);
+}
+
+.vidbee-download-button {
+  position: relative;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 36px;
+  height: 36px;
+  padding: 0;
+  background: rgba(0, 0, 0, 0.5);
+  backdrop-filter: blur(8px);
+  -webkit-backdrop-filter: blur(8px);
+  color: rgba(255, 255, 255, 0.8);
+  border: 1px solid rgba(255, 255, 255, 0.1);
+  border-radius: 50%;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
+  cursor: pointer;
+  font-size: 0;
+  transition: all 0.2s ease;
+  opacity: 0.6;
+  overflow: visible;
+}
+
+.vidbee-download-button:hover {
+  opacity: 1;
+  background: rgba(0, 0, 0, 0.7);
+  border-color: rgba(255, 255, 255, 0.2);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
+  transform: scale(1.1);
+}
+
+.vidbee-download-button:active {
+  transform: scale(0.95);
+}
+
+.vidbee-download-button svg {
+  flex-shrink: 0;
+  stroke: currentColor;
+  width: 16px;
+  height: 16px;
+}
+
+.vidbee-tooltip {
+  position: absolute;
+  right: calc(100% + 8px);
+  top: 50%;
+  padding: 6px 10px;
+  background: rgba(0, 0, 0, 0.9);
+  backdrop-filter: blur(8px);
+  -webkit-backdrop-filter: blur(8px);
+  color: white;
+  font-size: 12px;
+  font-weight: 500;
+  white-space: nowrap;
+  border-radius: 4px;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
+  opacity: 0;
+  pointer-events: none;
+  transition: opacity 0.2s ease, transform 0.2s ease;
+  transform: translateY(-50%) translateX(4px);
+  z-index: 10000;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial,
+    sans-serif;
+  line-height: 1;
+}
+
+.vidbee-tooltip::after {
+  content: '';
+  position: absolute;
+  left: 100%;
+  top: 50%;
+  transform: translateY(-50%);
+  border: 4px solid transparent;
+  border-left-color: rgba(0, 0, 0, 0.9);
+}
+
+.vidbee-download-button:hover .vidbee-tooltip {
+  opacity: 1;
+  transform: translateY(-50%) translateX(0);
+}
+
+.vidbee-close-button {
+  position: absolute;
+  top: -6px;
+  right: -6px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 18px;
+  height: 18px;
+  padding: 0;
+  background: rgba(255, 77, 77, 0.9);
+  backdrop-filter: blur(4px);
+  -webkit-backdrop-filter: blur(4px);
+  color: white;
+  border: 1px solid rgba(255, 255, 255, 0.2);
+  border-radius: 50%;
+  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
+  cursor: pointer;
+  font-size: 0;
+  transition: all 0.2s ease;
+  z-index: 1;
+  opacity: 0;
+  pointer-events: none;
+  overflow: visible;
+}
+
+.vidbee-download-container:hover .vidbee-close-button {
+  opacity: 1;
+  pointer-events: auto;
+}
+
+.vidbee-close-button:hover {
+  background: rgba(255, 77, 77, 1);
+  transform: scale(1.15);
+  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.4);
+}
+
+.vidbee-close-button:active {
+  transform: scale(0.9);
+}
+
+.vidbee-close-button svg {
+  flex-shrink: 0;
+  stroke: currentColor;
+  width: 10px;
+  height: 10px;
+}
+
+.vidbee-close-button .vidbee-tooltip {
+  right: calc(100% + 6px);
+  top: 50%;
+  left: auto;
+  transform: translateY(-50%) translateX(4px);
+}
+
+.vidbee-close-button .vidbee-tooltip::after {
+  left: 100%;
+  top: 50%;
+  right: auto;
+  transform: translateY(-50%);
+  border-left-color: rgba(0, 0, 0, 0.9);
+  border-top-color: transparent;
+}
+
+.vidbee-download-container:hover .vidbee-close-button:hover .vidbee-tooltip {
+  opacity: 1;
+  transform: translateY(-50%) translateX(0);
+}

extension/entrypoints/background.ts

@@ -0,0 +1,203 @@
+type VideoFormat = {
+  format_id?: string
+  ext?: string
+  format_note?: string
+  resolution?: string
+  width?: number
+  height?: number
+  fps?: number
+  vcodec?: string
+  acodec?: string
+  filesize?: number
+  filesize_approx?: number
+  tbr?: number
+}
+
+type VideoInfo = {
+  title?: string
+  thumbnail?: string
+  duration?: number
+  formats?: VideoFormat[]
+}
+
+type VideoInfoCacheEntry = {
+  url: string
+  status: 'pending' | 'ready' | 'error'
+  fetchedAt: number
+  info?: VideoInfo
+  error?: string
+}
+
+const PORT_RANGE_START = 27100
+const PORT_RANGE_END = 27120
+const STATUS_TIMEOUT_MS = 800
+const INFO_TIMEOUT_MS = 60000
+const CACHE_TTL_MS = 5 * 60 * 1000
+
+const pendingRequests = new Map<string, Promise<void>>()
+const defaultIconPaths = {
+  16: 'icon/16.png',
+  32: 'icon/32.png',
+  48: 'icon/48.png',
+  128: 'icon/128.png'
+}
+const loadingIconPaths = {
+  16: 'icon/icon-loading-16.png',
+  32: 'icon/icon-loading-32.png',
+  48: 'icon/icon-loading-48.png',
+  128: 'icon/icon-loading-128.png'
+}
+const successIconPaths = {
+  16: 'icon/icon-success-16.png',
+  32: 'icon/icon-success-32.png',
+  48: 'icon/icon-success-48.png',
+  128: 'icon/icon-success-128.png'
+}
+
+const setActionIcon = (status: 'default' | 'loading' | 'success', tabId?: number): void => {
+  const paths =
+    status === 'loading'
+      ? loadingIconPaths
+      : status === 'success'
+        ? successIconPaths
+        : defaultIconPaths
+  const options = tabId ? { path: paths, tabId } : { path: paths }
+  void browser.action.setIcon(options)
+}
+
+const fetchJson = async <T>(url: string, timeoutMs: number): Promise<T> => {
+  const controller = new AbortController()
+  const timeoutId = setTimeout(() => controller.abort('timeout'), timeoutMs)
+
+  try {
+    const response = await fetch(url, { signal: controller.signal })
+    const data = (await response.json().catch(() => null)) as (T & { error?: string }) | null
+    if (!response.ok) {
+      const message = data && typeof data === 'object' && 'error' in data ? data.error : null
+      const details = data && typeof data === 'object' && 'details' in data ? data.details : null
+      const combined = [message, details].filter(Boolean).join('\n\n')
+      throw new Error(combined || `Request failed: ${response.status}`)
+    }
+    return data as T
+  } catch (error) {
+    if (error instanceof DOMException && error.name === 'AbortError') {
+      throw new Error('Request timed out.')
+    }
+    if (error instanceof Error && error.message.includes('signal is aborted')) {
+      throw new Error('Request timed out.')
+    }
+    if (error instanceof Error && error.message.includes('Failed to fetch')) {
+      throw new Error('VidBee app not responding on this port.')
+    }
+    throw error
+  } finally {
+    clearTimeout(timeoutId)
+  }
+}
+
+const findAvailablePort = async (): Promise<number | null> => {
+  for (let port = PORT_RANGE_START; port <= PORT_RANGE_END; port += 1) {
+    const baseUrl = `http://127.0.0.1:${port}`
+    try {
+      await fetchJson<{ ok: boolean }>(`${baseUrl}/status`, STATUS_TIMEOUT_MS)
+      return port
+    } catch {
+      // Keep scanning.
+    }
+  }
+  return null
+}
+
+const requestVideoInfo = async (targetUrl: string): Promise<VideoInfo> => {
+  const port = await findAvailablePort()
+  if (!port) {
+    throw new Error('VidBee app not found on localhost.')
+  }
+
+  const baseUrl = `http://127.0.0.1:${port}`
+  const tokenResponse = await fetchJson<{ token?: string }>(`${baseUrl}/token`, STATUS_TIMEOUT_MS)
+  if (!tokenResponse.token) {
+    throw new Error('Failed to acquire token from VidBee.')
+  }
+
+  return fetchJson<VideoInfo>(
+    `${baseUrl}/video-info?url=${encodeURIComponent(targetUrl)}&token=${encodeURIComponent(
+      tokenResponse.token
+    )}`,
+    INFO_TIMEOUT_MS
+  )
+}
+
+const getCacheMap = async (): Promise<Record<string, VideoInfoCacheEntry>> => {
+  const data = await browser.storage.local.get('videoInfoCacheByUrl')
+  const map = data.videoInfoCacheByUrl as Record<string, VideoInfoCacheEntry> | undefined
+  if (!map) return {}
+  return map
+}
+
+const pruneCache = (map: Record<string, VideoInfoCacheEntry>): void => {
+  const now = Date.now()
+  for (const [key, entry] of Object.entries(map)) {
+    if (now - entry.fetchedAt > CACHE_TTL_MS) {
+      delete map[key]
+    }
+  }
+}
+
+const loadCache = async (url: string): Promise<VideoInfoCacheEntry | null> => {
+  const map = await getCacheMap()
+  pruneCache(map)
+  const cache = map[url]
+  if (!cache) return null
+  return cache
+}
+
+const saveCacheEntry = async (cache: VideoInfoCacheEntry): Promise<void> => {
+  const map = await getCacheMap()
+  pruneCache(map)
+  map[cache.url] = cache
+  await browser.storage.local.set({ videoInfoCacheByUrl: map })
+}
+
+const fetchAndCache = async (url: string, tabId?: number): Promise<void> => {
+  if (pendingRequests.has(url)) {
+    return pendingRequests.get(url) as Promise<void>
+  }
+
+  const task = (async () => {
+    const existing = await loadCache(url)
+    if (existing?.status === 'ready') {
+      setActionIcon('success', tabId)
+      return
+    }
+
+    setActionIcon('loading', tabId)
+    await saveCacheEntry({ url, status: 'pending', fetchedAt: Date.now() })
+
+    try {
+      const info = await requestVideoInfo(url)
+      await saveCacheEntry({ url, status: 'ready', fetchedAt: Date.now(), info })
+      setActionIcon('success', tabId)
+    } catch (error) {
+      const message = error instanceof Error ? error.message : 'Failed to fetch video info.'
+      await saveCacheEntry({ url, status: 'error', fetchedAt: Date.now(), error: message })
+      setActionIcon('default', tabId)
+    }
+  })()
+
+  pendingRequests.set(url, task)
+  try {
+    await task
+  } finally {
+    pendingRequests.delete(url)
+  }
+}
+
+export default defineBackground(() => {
+  browser.runtime.onMessage.addListener((message: { type?: string; url?: string }, sender) => {
+    if (message.type !== 'video-info:fetch' || !message.url) {
+      return
+    }
+    void fetchAndCache(message.url, sender.tab?.id)
+  })
+})

extension/entrypoints/popup/App.css

@@ -0,0 +1,317 @@
+:root {
+  --bg: #ffffff;
+  --fg: #111111;
+  --fg-secondary: #757575;
+  --border: #f0f0f0;
+  --accent: #000000;
+  --error: #e00000;
+  --success: #00c853;
+  --warning: #ffd600;
+}
+
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+  -webkit-font-smoothing: antialiased;
+  background: var(--bg);
+  color: var(--fg);
+}
+
+#root {
+  width: 360px;
+  min-height: 200px;
+  padding: 24px;
+  box-sizing: border-box;
+}
+
+.app {
+  display: flex;
+  flex-direction: column;
+  gap: 24px;
+}
+
+header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+h1 {
+  font-size: 13px;
+  font-weight: 600;
+  margin: 0;
+  letter-spacing: -0.01em;
+  color: var(--fg);
+}
+
+.status-indicator {
+  font-size: 11px;
+  font-weight: 500;
+  color: var(--fg-secondary);
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.status-dot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background-color: var(--border);
+}
+.status-dot.loading { background-color: var(--warning); box-shadow: 0 0 4px var(--warning); }
+.status-dot.ok { background-color: var(--success); }
+.status-dot.error { background-color: var(--error); }
+
+.video-info {
+  display: grid;
+  grid-template-columns: 1fr 90px;
+  gap: 20px;
+  align-items: start;
+}
+
+.video-details h2 {
+  font-size: 15px;
+  font-weight: 500;
+  line-height: 1.4;
+  margin: 0 0 8px 0;
+  color: var(--fg);
+}
+
+.meta-row {
+  font-size: 12px;
+  color: var(--fg-secondary);
+  margin: 0 0 4px 0;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.thumbnail {
+  width: 90px;
+  height: 50px;
+  background: var(--border);
+  object-fit: cover;
+  border-radius: 6px;
+  display: block;
+}
+
+.formats-section {
+  display: flex;
+  flex-direction: column;
+  gap: 20px;
+}
+
+.format-group {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+/* Sticky headers for long lists */
+.sticky-title {
+  position: sticky;
+  top: 0;
+  background: var(--bg);
+  padding: 4px 0;
+  z-index: 10;
+}
+
+.group-title {
+  font-size: 11px;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+  color: var(--fg-secondary);
+  font-weight: 600;
+  border-bottom: 2px solid var(--border);
+  padding-bottom: 4px;
+}
+
+.format-table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 12px;
+  table-layout: fixed;
+}
+
+.format-table th {
+  text-align: left;
+  font-weight: 400;
+  color: var(--fg-secondary);
+  padding-bottom: 6px;
+  border-bottom: 1px solid var(--border);
+  font-size: 10px;
+  text-transform: uppercase;
+  padding-top: 6px;
+}
+
+.format-table td {
+  padding: 6px 0;
+  border-bottom: 1px solid var(--border);
+  color: var(--fg);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.format-table tr:last-child td {
+  border-bottom: none;
+}
+
+.col-id { width: 50px; color: var(--fg-secondary); }
+.col-ext { width: 50px; }
+.col-size { width: 60px; text-align: right; }
+.format-table th.col-size { text-align: right; }
+
+.empty-state {
+  font-size: 12px;
+  color: var(--fg-secondary);
+  padding: 12px 0;
+  font-style: italic;
+  text-align: center;
+}
+
+.error-banner {
+  font-size: 12px;
+  color: var(--error);
+  line-height: 1.5;
+  background: rgba(224, 0, 0, 0.05);
+  padding: 12px;
+  border-radius: 6px;
+}
+
+.primary-button {
+  background: var(--fg);
+  color: var(--bg);
+  border: none;
+  border-radius: 8px;
+  padding: 12px;
+  font-size: 13px;
+  font-weight: 500;
+  cursor: pointer;
+  width: 100%;
+  transition: opacity 0.2s;
+}
+
+.primary-button:hover {
+  opacity: 0.9;
+}
+
+.primary-button:active {
+  transform: scale(0.98);
+}
+
+
+.error-container {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.error-header {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+
+.error-title {
+  font-size: 16px;
+  font-weight: 600;
+  margin: 0;
+  color: var(--fg);
+}
+
+.error-description {
+  font-size: 12px;
+  color: var(--fg-secondary);
+  margin: 0;
+  line-height: 1.5;
+}
+
+.action-grid {
+  display: grid;
+  gap: 12px;
+}
+
+.action-card {
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  padding: 12px;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  background: #fafafa;
+}
+
+.action-title {
+  font-size: 11px;
+  font-weight: 600;
+  color: var(--fg-secondary);
+  margin: 0;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+}
+
+.action-text {
+  font-size: 13px;
+  color: var(--fg);
+  margin: 0;
+  line-height: 1.5;
+}
+
+.secondary-button {
+  border: 1px solid var(--fg);
+  border-radius: 8px;
+  padding: 8px 10px;
+  font-size: 12px;
+  font-weight: 500;
+  cursor: pointer;
+  background: transparent;
+  color: var(--fg);
+  text-decoration: none;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: fit-content;
+}
+
+.secondary-button:hover {
+  background: var(--border);
+}
+
+
+.loading-container {
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  align-items: center;
+  min-height: 200px;
+  gap: 16px;
+  flex: 1;
+  width: 100%;
+}
+
+.spinner {
+  width: 24px;
+  height: 24px;
+  border: 2.5px solid var(--border);
+  border-top-color: var(--fg);
+  border-radius: 50%;
+  animation: spin 0.8s linear infinite;
+}
+
+.loading-text {
+  font-size: 13px;
+  font-weight: 500;
+  color: var(--fg-secondary);
+  animation: pulse 1.5s ease-in-out infinite;
+}
+
+@keyframes spin {
+  to { transform: rotate(360deg); }
+}
+
+@keyframes pulse {
+  0%, 100% { opacity: 1; }
+  50% { opacity: 0.6; }
+}

extension/entrypoints/popup/App.tsx

@@ -0,0 +1,473 @@
+import { useEffect, useMemo, useState } from 'react'
+import './App.css'
+
+type VideoFormat = {
+  format_id?: string
+  ext?: string
+  format_note?: string
+  resolution?: string
+  width?: number
+  height?: number
+  fps?: number
+  vcodec?: string
+  acodec?: string
+  filesize?: number
+  filesize_approx?: number
+  tbr?: number
+}
+
+type VideoInfo = {
+  title?: string
+  thumbnail?: string
+  duration?: number
+  formats?: VideoFormat[]
+}
+
+const CACHE_TTL_MS = 60 * 60 * 1000
+
+const isValidHttpUrl = (value?: string): boolean => {
+  if (!value) return false
+  return value.startsWith('http://') || value.startsWith('https://')
+}
+
+const formatDuration = (value?: number): string => {
+  if (!value || value <= 0) return 'Unknown'
+  const totalSeconds = Math.round(value)
+  const hours = Math.floor(totalSeconds / 3600)
+  const minutes = Math.floor((totalSeconds % 3600) / 60)
+  const seconds = totalSeconds % 60
+  const paddedMinutes = hours > 0 ? String(minutes).padStart(2, '0') : String(minutes)
+  const paddedSeconds = String(seconds).padStart(2, '0')
+  return hours > 0 ? `${hours}:${paddedMinutes}:${paddedSeconds}` : `${minutes}:${paddedSeconds}`
+}
+
+const formatBytes = (value?: number): string => {
+  if (!value || value <= 0) return '-'
+  const units = ['B', 'KB', 'MB', 'GB']
+  let size = value
+  let unitIndex = 0
+  while (size >= 1024 && unitIndex < units.length - 1) {
+    size /= 1024
+    unitIndex += 1
+  }
+  return `${size.toFixed(size >= 100 || unitIndex === 0 ? 0 : 1)} ${units[unitIndex]}`
+}
+
+const isVideoFormat = (format: VideoFormat): boolean => {
+  if (format.vcodec && format.vcodec !== 'none') {
+    return true
+  }
+  return Boolean(format.resolution || format.width || format.height)
+}
+
+const isAudioFormat = (format: VideoFormat): boolean => {
+  return Boolean(format.acodec && format.acodec !== 'none' && !isVideoFormat(format))
+}
+
+type VideoInfoCacheEntry = {
+  url: string
+  status: 'pending' | 'ready' | 'error'
+  fetchedAt: number
+  info?: VideoInfo
+  error?: string
+}
+
+type VideoGroup = {
+  label: string
+  height: number
+  formats: VideoFormat[]
+}
+
+const loadCachedInfo = async (url: string): Promise<VideoInfoCacheEntry | null> => {
+  const data = await browser.storage.local.get('videoInfoCacheByUrl')
+  const map = data.videoInfoCacheByUrl as Record<string, VideoInfoCacheEntry> | undefined
+  if (!map) return null
+  const cached = map[url]
+  if (!cached) return null
+  if (Date.now() - cached.fetchedAt > CACHE_TTL_MS) return null
+  return cached
+}
+
+const sanitizeError = (error: string): string => {
+  const message = error.toLowerCase()
+  if (
+    message.includes('localhost') ||
+    message.includes('fetch') ||
+    message.includes('network') ||
+    message.includes('connect') ||
+    message.includes('failed to request')
+  ) {
+    return 'Client connection failed'
+  }
+  return error
+}
+
+function App() {
+  const [info, setInfo] = useState<VideoInfo | null>(null)
+  const [error, setError] = useState<string | null>(null)
+  const [loading, setLoading] = useState(false)
+  const [currentUrl, setCurrentUrl] = useState<string>('')
+  const [retryTrigger, setRetryTrigger] = useState(0)
+
+  useEffect(() => {
+    let active = true
+    const targetState = { url: '' }
+
+    const handleStorageChange = (
+      changes: Record<string, browser.storage.StorageChange>,
+      areaName: string
+    ) => {
+      if (!active || areaName !== 'local') return
+      const change = changes.videoInfoCacheByUrl
+      if (!change?.newValue) return
+
+      const map = change.newValue as Record<string, VideoInfoCacheEntry>
+      const next = map[targetState.url]
+      if (!next) return
+
+      if (next.status === 'ready' && next.info) {
+        setInfo(next.info)
+        setError(null)
+        setLoading(false)
+      } else if (next.status === 'error' && next.error) {
+        setError(sanitizeError(next.error))
+        setInfo(null)
+        setLoading(false)
+      } else if (next.status === 'pending') {
+        setLoading(true)
+      }
+    }
+
+    browser.storage.onChanged.addListener(handleStorageChange)
+
+    const loadInfo = async () => {
+      setLoading(true)
+      setError(null)
+      setInfo(null)
+
+      const [tab] = await browser.tabs.query({ active: true, currentWindow: true })
+      if (!isValidHttpUrl(tab?.url)) {
+        setError('Please open a valid video page first.')
+        setLoading(false)
+        return
+      }
+
+      const targetUrl = tab.url as string
+      targetState.url = targetUrl
+      setCurrentUrl(targetUrl)
+
+      const cached = await loadCachedInfo(targetUrl)
+      const shouldBypassCache = retryTrigger > 0
+      if (cached && !shouldBypassCache) {
+        if (cached.status === 'ready' && cached.info) {
+          setInfo(cached.info)
+          setLoading(false)
+          return
+        }
+        if (cached.status === 'error' && cached.error) {
+          setError(sanitizeError(cached.error))
+          setLoading(false)
+          return
+        }
+      }
+
+      try {
+        await browser.runtime.sendMessage({
+          type: 'video-info:fetch',
+          url: targetUrl
+        })
+      } catch (err) {
+        const message = err instanceof Error ? err.message : 'Failed to request video info.'
+        setError(sanitizeError(message))
+        setLoading(false)
+      }
+
+      const latest = await loadCachedInfo(targetUrl)
+      if (latest && latest.status === 'ready' && latest.info) {
+        setInfo(latest.info)
+        setError(null)
+        setLoading(false)
+      } else if (latest && latest.status === 'error' && latest.error) {
+        setError(sanitizeError(latest.error))
+        setInfo(null)
+        setLoading(false)
+      }
+    }
+
+    void loadInfo()
+
+    return () => {
+      active = false
+      browser.storage.onChanged.removeListener(handleStorageChange)
+    }
+  }, [retryTrigger])
+
+  const formats = useMemo(() => info?.formats ?? [], [info])
+  const groupedFormats = useMemo(() => {
+    const video: VideoFormat[] = []
+    const audio: VideoFormat[] = []
+    const other: VideoFormat[] = []
+
+    for (const format of formats) {
+      if (isVideoFormat(format)) {
+        video.push(format)
+      } else if (isAudioFormat(format)) {
+        audio.push(format)
+      } else {
+        other.push(format)
+      }
+    }
+
+    return { video, audio, other }
+  }, [formats])
+
+  const groupedVideoFormats = useMemo(() => {
+    const raw = groupedFormats.video
+    if (!raw.length) return []
+
+    const groups: Record<number, VideoFormat[]> = {}
+    const noHeight: VideoFormat[] = []
+
+    for (const f of raw) {
+      const h = f.height || f.resolution?.match(/x(\d+)/)?.[1]
+      const heightVal = h ? Number(h) : 0
+
+      if (heightVal > 0) {
+        if (!groups[heightVal]) groups[heightVal] = []
+        groups[heightVal].push(f)
+      } else {
+        noHeight.push(f)
+      }
+    }
+
+    const sortedLabels = Object.keys(groups)
+      .map(Number)
+      .sort((a, b) => b - a)
+
+    const result: VideoGroup[] = sortedLabels.map((h) => ({
+      label: `${h}p`,
+      height: h,
+      formats: groups[h].sort((a, b) => {
+        const sa = a.filesize || a.filesize_approx || 0
+        const sb = b.filesize || b.filesize_approx || 0
+        return sb - sa
+      })
+    }))
+
+    if (noHeight.length > 0) {
+      result.push({
+        label: 'Other',
+        height: 0,
+        formats: noHeight
+      })
+    }
+
+    return result
+  }, [groupedFormats.video])
+
+  const wait = (ms: number) => new Promise((resolve) => setTimeout(resolve, ms))
+  const clientLaunchDelayMs = 2000
+
+  const openClientApp = async () => {
+    window.location.href = 'vidbee://'
+    await wait(clientLaunchDelayMs)
+  }
+
+  const handleOpenClient = () => {
+    if (!currentUrl) return
+    const deepLink = `vidbee://download?url=${encodeURIComponent(currentUrl)}`
+    window.location.href = deepLink
+  }
+
+  const handleOpenClientAndRetry = async () => {
+    await openClientApp()
+    setRetryTrigger((count) => count + 1)
+  }
+
+  const handleRetry = () => {
+    setRetryTrigger((count) => count + 1)
+  }
+
+  const isInvalidPageError = error === 'Please open a valid video page first.'
+  const isClientConnectionError = Boolean(error?.includes('Client connection failed'))
+  const errorTitle = isInvalidPageError
+    ? 'Open a video page'
+    : isClientConnectionError
+      ? 'Connect the VidBee app'
+      : 'Something went wrong'
+  const errorDescription = isInvalidPageError
+    ? 'Navigate to a supported video page, then try again.'
+    : isClientConnectionError
+      ? 'The extension needs the VidBee desktop app to be running.'
+      : 'Try again in a moment.'
+
+  const renderStatus = () => {
+    if (loading)
+      return (
+        <span className="status-indicator">
+          <div className="status-dot loading" /> Working
+        </span>
+      )
+    if (error)
+      return (
+        <span className="status-indicator">
+          <div className="status-dot error" /> Error
+        </span>
+      )
+    if (info)
+      return (
+        <span className="status-indicator">
+          <div className="status-dot ok" /> Ready
+        </span>
+      )
+    return (
+      <span className="status-indicator">
+        <div className="status-dot" /> Idle
+      </span>
+    )
+  }
+
+  return (
+    <div className="app">
+      <header>
+        <h1>VidBee</h1>
+        {renderStatus()}
+      </header>
+      {loading && (
+        <div className="loading-container">
+          <div className="spinner" />
+          <div className="loading-text">Analyzing video...</div>
+        </div>
+      )}
+
+      {!loading && error && (
+        <div className="error-container">
+          <div className="error-header">
+            <h2 className="error-title">{errorTitle}</h2>
+            <p className="error-description">{errorDescription}</p>
+          </div>
+          <div className="error-banner">{error}</div>
+          {isClientConnectionError ? (
+            <div className="action-grid">
+              <div className="action-card">
+                <p className="action-title">Client installed</p>
+                <p className="action-text">
+                  Start VidBee and keep it running, then we will retry automatically.
+                </p>
+                <button
+                  type="button"
+                  className="secondary-button"
+                  onClick={handleOpenClientAndRetry}
+                >
+                  Open Client
+                </button>
+              </div>
+              <div className="action-card">
+                <p className="action-title">Need the app?</p>
+                <p className="action-text">
+                  Download VidBee once, install it, then come back here to try again.
+                </p>
+                <a
+                  href="https://vidbee.app"
+                  target="_blank"
+                  rel="noopener noreferrer"
+                  className="secondary-button"
+                >
+                  Download VidBee
+                </a>
+              </div>
+            </div>
+          ) : (
+            <div className="action-card">
+              <p className="action-title">Try again</p>
+              <p className="action-text">
+                {isInvalidPageError
+                  ? 'Open a supported video page, then retry.'
+                  : 'Retry after a moment.'}
+              </p>
+              <button type="button" className="secondary-button" onClick={handleRetry}>
+                Retry
+              </button>
+            </div>
+          )}
+        </div>
+      )}
+
+      {!loading && !error && info && (
+        <>
+          <section className="video-info">
+            <div className="video-details">
+              <h2>{info.title || 'Untitled video'}</h2>
+              <div className="meta-row">
+                <span>{formatDuration(info.duration)}</span>
+                <span>•</span>
+                <span>{formats.length} formats</span>
+              </div>
+            </div>
+            {info.thumbnail && <img className="thumbnail" src={info.thumbnail} alt="" />}
+          </section>
+
+          <button type="button" className="primary-button" onClick={handleOpenClient}>
+            Download with VidBee
+          </button>
+
+          <section className="formats-section">
+            {groupedVideoFormats.map((group) => (
+              <div className="format-group" key={group.label}>
+                <div className="group-title sticky-title">{group.label}</div>
+                <table className="format-table">
+                  <thead>
+                    <tr>
+                      <th className="col-id">ID</th>
+                      <th className="col-ext">Ext</th>
+                      <th className="col-size">Size</th>
+                    </tr>
+                  </thead>
+                  <tbody>
+                    {group.formats.map((f) => (
+                      <tr key={`vg-${group.label}-${f.format_id ?? f.ext ?? 'video'}`}>
+                        <td className="col-id">{f.format_id || '-'}</td>
+                        <td className="col-ext">{f.ext || '-'}</td>
+                        <td className="col-size">{formatBytes(f.filesize || f.filesize_approx)}</td>
+                      </tr>
+                    ))}
+                  </tbody>
+                </table>
+              </div>
+            ))}
+
+            {groupedVideoFormats.length === 0 && groupedFormats.audio.length === 0 && (
+              <div className="empty-state">No compatible formats.</div>
+            )}
+
+            {groupedFormats.audio.length > 0 && (
+              <div className="format-group">
+                <div className="group-title">Audio Only</div>
+                <table className="format-table">
+                  <thead>
+                    <tr>
+                      <th className="col-id">ID</th>
+                      <th className="col-ext">Ext</th>
+                      <th className="col-size">Size</th>
+                    </tr>
+                  </thead>
+                  <tbody>
+                    {groupedFormats.audio.map((f) => (
+                      <tr key={`a-${f.format_id ?? f.ext ?? 'audio'}`}>
+                        <td className="col-id">{f.format_id || '-'}</td>
+                        <td className="col-ext">{f.ext || '-'}</td>
+                        <td className="col-size">{formatBytes(f.filesize || f.filesize_approx)}</td>
+                      </tr>
+                    ))}
+                  </tbody>
+                </table>
+              </div>
+            )}
+          </section>
+        </>
+      )}
+    </div>
+  )
+}
+
+export default App

extension/entrypoints/popup/index.html

@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Default Popup Title</title>
+    <meta name="manifest.type" content="browser_action" />
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="./main.tsx"></script>
+  </body>
+</html>

extension/entrypoints/popup/main.tsx

@@ -0,0 +1,13 @@
+import React from 'react'
+import ReactDOM from 'react-dom/client'
+import App from './App.tsx'
+
+const root = document.getElementById('root')
+
+if (root) {
+  ReactDOM.createRoot(root).render(
+    <React.StrictMode>
+      <App />
+    </React.StrictMode>
+  )
+}

extension/package.json

@@ -0,0 +1,28 @@
+{
+  "name": "vidbee-extension",
+  "description": "manifest.json description",
+  "private": true,
+  "version": "0.0.1",
+  "type": "module",
+  "scripts": {
+    "dev": "wxt",
+    "dev:firefox": "wxt -b firefox",
+    "build": "wxt build",
+    "build:firefox": "wxt build -b firefox",
+    "zip": "wxt zip",
+    "zip:firefox": "wxt zip -b firefox",
+    "compile": "tsc --noEmit",
+    "postinstall": "wxt prepare"
+  },
+  "dependencies": {
+    "react": "^19.2.3",
+    "react-dom": "^19.2.3"
+  },
+  "devDependencies": {
+    "@types/react": "^19.2.7",
+    "@types/react-dom": "^19.2.3",
+    "@wxt-dev/module-react": "^1.1.5",
+    "typescript": "^5.9.3",
+    "wxt": "^0.20.6"
+  }
+}

extension/public/_locales/en/messages.json

@@ -0,0 +1,14 @@
+{
+  "extensionName": {
+    "message": "VidBee Video Downloader"
+  },
+  "extensionDescription": {
+    "message": "Download videos from over 1,000 websites with VidBee."
+  },
+  "downloadWithVidBee": {
+    "message": "Download with VidBee"
+  },
+  "hideButton": {
+    "message": "Hide"
+  }
+}

extension/tsconfig.json

@@ -0,0 +1,7 @@
+{
+  "extends": "./.wxt/tsconfig.json",
+  "compilerOptions": {
+    "allowImportingTsExtensions": true,
+    "jsx": "react-jsx"
+  }
+}

extension/wxt.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from 'wxt'
+
+// See https://wxt.dev/api/config.html
+export default defineConfig({
+  modules: ['@wxt-dev/module-react'],
+  manifest: {
+    name: '__MSG_extensionName__',
+    description: '__MSG_extensionDescription__',
+    default_locale: 'en',
+    host_permissions: ['http://127.0.0.1/*'],
+    permissions: ['activeTab', 'storage']
+  }
+})

monkey/.gitignore

@@ -0,0 +1,23 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

monkey/dist/vidbee-quick-download.user.js

@@ -0,0 +1,156 @@
+// ==UserScript==
+// @name       vidbee-quick-download
+// @namespace  vidbee
+// @version    0.0.1
+// @icon       https://vidbee.org/favicon.svg
+// @match      https://www.youtube.com/*
+// @match      https://youtube.com/*
+// @match      https://music.youtube.com/*
+// @match      https://www.bilibili.com/*
+// @match      https://bilibili.com/*
+// @match      https://www.tiktok.com/*
+// @match      https://tiktok.com/*
+// @match      https://vimeo.com/*
+// @match      https://www.vimeo.com/*
+// @match      https://www.dailymotion.com/*
+// @match      https://dailymotion.com/*
+// @match      https://www.twitch.tv/*
+// @match      https://twitch.tv/*
+// @match      https://twitter.com/*
+// @match      https://www.twitter.com/*
+// @match      https://x.com/*
+// @match      https://www.x.com/*
+// @match      https://www.instagram.com/*
+// @match      https://instagram.com/*
+// @match      https://www.facebook.com/*
+// @match      https://facebook.com/*
+// @match      https://fb.com/*
+// @match      https://www.fb.com/*
+// @match      https://www.reddit.com/*
+// @match      https://reddit.com/*
+// @match      https://soundcloud.com/*
+// @match      https://www.soundcloud.com/*
+// @match      https://www.nicovideo.jp/*
+// @match      https://nicovideo.jp/*
+// @match      https://kick.com/*
+// @match      https://www.kick.com/*
+// @match      https://bandcamp.com/*
+// @match      https://*.bandcamp.com/*
+// @match      https://www.mixcloud.com/*
+// @match      https://mixcloud.com/*
+// @grant      GM_addStyle
+// ==/UserScript==
+
+(function () {
+  'use strict';
+
+  const d=new Set;const importCSS = async e=>{d.has(e)||(d.add(e),(t=>{typeof GM_addStyle=="function"?GM_addStyle(t):(document.head||document.documentElement).appendChild(document.createElement("style")).append(t);})(e));};
+
+  const styleCss = '.vidbee-download-container{position:fixed;bottom:16px;right:16px;z-index:9999;transition:all .2s ease;overflow:visible}.vidbee-download-container.vidbee-hidden{opacity:0;pointer-events:none;transform:scale(0)}.vidbee-download-button{position:relative;display:flex;align-items:center;justify-content:center;width:36px;height:36px;padding:0;background:#00000080;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);color:#fffc;border:1px solid rgba(255,255,255,.1);border-radius:50%;box-shadow:0 2px 8px #0003;cursor:pointer;font-size:0;transition:all .2s ease;opacity:.6;overflow:visible}.vidbee-download-button:hover{opacity:1;background:#000000b3;border-color:#fff3;box-shadow:0 4px 12px #0000004d;transform:scale(1.1)}.vidbee-download-button:active{transform:scale(.95)}.vidbee-download-button svg{flex-shrink:0;stroke:currentColor;width:16px;height:16px}.vidbee-tooltip{position:absolute;right:calc(100% + 8px);top:50%;padding:6px 10px;background:#000000e6;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);color:#fff;font-size:12px;font-weight:500;white-space:nowrap;border-radius:4px;box-shadow:0 2px 8px #0000004d;opacity:0;pointer-events:none;transition:opacity .2s ease,transform .2s ease;transform:translateY(-50%) translate(4px);z-index:10000;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1}.vidbee-tooltip:after{content:"";position:absolute;left:100%;top:50%;transform:translateY(-50%);border:4px solid transparent;border-left-color:#000000e6}.vidbee-download-button:hover .vidbee-tooltip{opacity:1;transform:translateY(-50%) translate(0)}.vidbee-close-button{position:absolute;top:-6px;right:-6px;display:flex;align-items:center;justify-content:center;width:18px;height:18px;padding:0;background:#ff4d4de6;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);color:#fff;border:1px solid rgba(255,255,255,.2);border-radius:50%;box-shadow:0 2px 4px #0000004d;cursor:pointer;font-size:0;transition:all .2s ease;z-index:1;opacity:0;pointer-events:none;overflow:visible}.vidbee-download-container:hover .vidbee-close-button{opacity:1;pointer-events:auto}.vidbee-close-button:hover{background:#ff4d4d;transform:scale(1.15);box-shadow:0 3px 6px #0006}.vidbee-close-button:active{transform:scale(.9)}.vidbee-close-button svg{flex-shrink:0;stroke:currentColor;width:10px;height:10px}.vidbee-close-button .vidbee-tooltip{right:calc(100% + 6px);top:50%;left:auto;transform:translateY(-50%) translate(4px)}.vidbee-close-button .vidbee-tooltip:after{left:100%;top:50%;right:auto;transform:translateY(-50%);border-left-color:#000000e6;border-top-color:transparent}.vidbee-download-container:hover .vidbee-close-button:hover .vidbee-tooltip{opacity:1;transform:translateY(-50%) translate(0)}';
+  importCSS(styleCss);
+  function getVideoUrl() {
+    return window.location.href;
+  }
+  function hideButtonTemporarily() {
+    const container = document.getElementById("vidbee-download-btn");
+    if (container) {
+      container.classList.add("vidbee-hidden");
+      setTimeout(() => {
+        if (container) {
+          container.classList.remove("vidbee-hidden");
+        }
+      }, 5e3);
+    }
+  }
+  function createVidBeeButton() {
+    if (document.getElementById("vidbee-download-btn")) {
+      return;
+    }
+    const videoUrl = getVideoUrl();
+    if (!videoUrl) {
+      return;
+    }
+    const container = document.createElement("div");
+    container.id = "vidbee-download-btn";
+    container.className = "vidbee-download-container";
+    const button = document.createElement("button");
+    button.className = "vidbee-download-button";
+    button.setAttribute("aria-label", "Download with VidBee");
+    button.innerHTML = `
+    <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+      <path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"></path>
+      <polyline points="7 10 12 15 17 10"></polyline>
+      <line x1="12" y1="15" x2="12" y2="3"></line>
+    </svg>
+    <span class="vidbee-tooltip">Download with VidBee</span>
+  `;
+    const closeButton = document.createElement("button");
+    closeButton.className = "vidbee-close-button";
+    closeButton.setAttribute("aria-label", "Hide button");
+    closeButton.innerHTML = `
+    <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3">
+      <line x1="18" y1="6" x2="6" y2="18"></line>
+      <line x1="6" y1="6" x2="18" y2="18"></line>
+    </svg>
+    <span class="vidbee-tooltip">Hide</span>
+  `;
+    closeButton.addEventListener("click", (e) => {
+      e.stopPropagation();
+      hideButtonTemporarily();
+    });
+    let clickTimer = null;
+    let clickCount = 0;
+    button.addEventListener("click", () => {
+      clickCount++;
+      if (clickCount === 1) {
+        clickTimer = window.setTimeout(() => {
+          const vidbeeUrl = `vidbee://download?url=${encodeURIComponent(videoUrl)}`;
+          window.location.href = vidbeeUrl;
+          clickCount = 0;
+        }, 300);
+      } else if (clickCount === 2) {
+        if (clickTimer !== null) {
+          clearTimeout(clickTimer);
+        }
+        clickCount = 0;
+        hideButtonTemporarily();
+      }
+    });
+    container.appendChild(button);
+    container.appendChild(closeButton);
+    document.body.appendChild(container);
+  }
+  function init() {
+    if (document.readyState === "loading") {
+      document.addEventListener("DOMContentLoaded", createVidBeeButton);
+    } else {
+      createVidBeeButton();
+    }
+    let lastUrl = location.href;
+    let urlCheckTimer = null;
+    const checkUrlChange = () => {
+      const currentUrl = location.href;
+      if (currentUrl !== lastUrl) {
+        lastUrl = currentUrl;
+        const oldButton = document.getElementById("vidbee-download-btn");
+        if (oldButton) {
+          oldButton.remove();
+        }
+        const hostname = window.location.hostname;
+        const delay = hostname.includes("bilibili.com") ? 800 : 500;
+        setTimeout(createVidBeeButton, delay);
+      }
+    };
+    new MutationObserver(() => {
+      if (urlCheckTimer !== null) {
+        clearTimeout(urlCheckTimer);
+      }
+      urlCheckTimer = window.setTimeout(checkUrlChange, 100);
+    }).observe(document.body, { childList: true, subtree: true });
+    window.addEventListener("popstate", () => {
+      setTimeout(checkUrlChange, 300);
+    });
+  }
+  init();
+
+})();

monkey/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "vidbee-quick-download",
+  "private": true,
+  "version": "0.0.1",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc && vite build",
+    "preview": "vite preview"
+  },
+  "devDependencies": {
+    "typescript": "^5.9.2",
+    "vite": "^7.1.3",
+    "vite-plugin-monkey": "^7.1.1"
+  }
+}

monkey/pnpm-lock.yaml

@@ -0,0 +1,943 @@
+lockfileVersion: '9.0'
+
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false
+
+importers:
+
+  .:
+    devDependencies:
+      typescript:
+        specifier: ^5.9.2
+        version: 5.9.3
+      vite:
+        specifier: ^7.1.3
+        version: 7.3.0
+      vite-plugin-monkey:
+        specifier: ^7.1.1
+        version: 7.1.8(postcss@8.5.6)(vite@7.3.0)
+
+packages:
+
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+    engines: {node: '>=18'}
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+
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+    engines: {node: '>=18'}
+    cpu: [arm64]
+    os: [android]
+
+  '@esbuild/android-arm@0.27.2':
+    resolution: {integrity: sha512-DVNI8jlPa7Ujbr1yjU2PfUSRtAUZPG9I1RwW4F4xFB1Imiu2on0ADiI/c3td+KmDtVKNbi+nffGDQMfcIMkwIA==}
+    engines: {node: '>=18'}
+    cpu: [arm]
+    os: [android]
+
+  '@esbuild/android-x64@0.27.2':
+    resolution: {integrity: sha512-z8Ank4Byh4TJJOh4wpz8g2vDy75zFL0TlZlkUkEwYXuPSgX8yzep596n6mT7905kA9uHZsf/o2OJZubl2l3M7A==}
+    engines: {node: '>=18'}
+    cpu: [x64]
+    os: [android]
+
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+    os: [darwin]
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+    engines: {node: '>=18'}
+    cpu: [x64]
+    os: [darwin]
+
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+    resolution: {integrity: sha512-lS/9CN+rgqQ9czogxlMcBMGd+l8Q3Nj1MFQwBZJyoEKI50XGxwuzznYdwcav6lpOGv5BqaZXqvBSiB/kJ5op+g==}
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+
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+
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+
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+
+  '@esbuild/netbsd-x64@0.27.2':
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+
+  '@esbuild/openbsd-arm64@0.27.2':
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+    engines: {node: '>=18'}
+    cpu: [arm64]
+    os: [openbsd]
+
+  '@esbuild/openbsd-x64@0.27.2':
+    resolution: {integrity: sha512-/it7w9Nb7+0KFIzjalNJVR5bOzA9Vay+yIPLVHfIQYG/j+j9VTH84aNB8ExGKPU4AzfaEvN9/V4HV+F+vo8OEg==}
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+
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+    cpu: [x64]
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+    cpu: [arm64]
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+
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monkey/src/main.ts

@@ -0,0 +1,146 @@
+import './style.css'
+
+// Get current video URL
+// yt-dlp can handle all URLs directly, so we just return the current URL
+function getVideoUrl(): string | null {
+  return window.location.href
+}
+
+// Temporarily hide button
+function hideButtonTemporarily(): void {
+  const container = document.getElementById('vidbee-download-btn')
+  if (container) {
+    container.classList.add('vidbee-hidden')
+    // Auto restore after 5 seconds
+    setTimeout(() => {
+      if (container) {
+        container.classList.remove('vidbee-hidden')
+      }
+    }, 5000)
+  }
+}
+
+// Create VidBee download button
+function createVidBeeButton(): void {
+  // Check if button already exists
+  if (document.getElementById('vidbee-download-btn')) {
+    return
+  }
+
+  const videoUrl = getVideoUrl()
+  if (!videoUrl) {
+    return
+  }
+
+  // Create button container
+  const container = document.createElement('div')
+  container.id = 'vidbee-download-btn'
+  container.className = 'vidbee-download-container'
+
+  // Create main download button
+  const button = document.createElement('button')
+  button.className = 'vidbee-download-button'
+  button.setAttribute('aria-label', 'Download with VidBee')
+  button.innerHTML = `
+    <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+      <path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"></path>
+      <polyline points="7 10 12 15 17 10"></polyline>
+      <line x1="12" y1="15" x2="12" y2="3"></line>
+    </svg>
+    <span class="vidbee-tooltip">Download with VidBee</span>
+  `
+
+  // Create close button
+  const closeButton = document.createElement('button')
+  closeButton.className = 'vidbee-close-button'
+  closeButton.setAttribute('aria-label', 'Hide button')
+  closeButton.innerHTML = `
+    <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3">
+      <line x1="18" y1="6" x2="6" y2="18"></line>
+      <line x1="6" y1="6" x2="18" y2="18"></line>
+    </svg>
+    <span class="vidbee-tooltip">Hide</span>
+  `
+
+  // Handle close button click - temporarily hide
+  closeButton.addEventListener('click', (e) => {
+    e.stopPropagation()
+    hideButtonTemporarily()
+  })
+
+  let clickTimer: number | null = null
+  let clickCount = 0
+
+  // Handle main button click event - single click for download
+  button.addEventListener('click', () => {
+    clickCount++
+
+    if (clickCount === 1) {
+      clickTimer = window.setTimeout(() => {
+        // Single click - trigger download
+        const vidbeeUrl = `vidbee://download?url=${encodeURIComponent(videoUrl)}`
+        window.location.href = vidbeeUrl
+        clickCount = 0
+      }, 300)
+    } else if (clickCount === 2) {
+      // Double click - temporarily hide
+      if (clickTimer !== null) {
+        clearTimeout(clickTimer)
+      }
+      clickCount = 0
+      hideButtonTemporarily()
+    }
+  })
+
+  // Assemble container
+  container.appendChild(button)
+  container.appendChild(closeButton)
+
+  // Insert container directly to body (fixed position)
+  document.body.appendChild(container)
+}
+
+// Initialize when page loads
+function init(): void {
+  // Wait for page to fully load
+  if (document.readyState === 'loading') {
+    document.addEventListener('DOMContentLoaded', createVidBeeButton)
+  } else {
+    createVidBeeButton()
+  }
+
+  // Handle SPA navigation (when navigating between videos on sites like YouTube, Bilibili, etc.)
+  let lastUrl = location.href
+  let urlCheckTimer: number | null = null
+
+  const checkUrlChange = () => {
+    const currentUrl = location.href
+    if (currentUrl !== lastUrl) {
+      lastUrl = currentUrl
+      // Remove old button and create new one
+      const oldButton = document.getElementById('vidbee-download-btn')
+      if (oldButton) {
+        oldButton.remove()
+      }
+      // Wait a bit for the page to update (different sites have different update speeds)
+      const hostname = window.location.hostname
+      const delay = hostname.includes('bilibili.com') ? 800 : 500
+      setTimeout(createVidBeeButton, delay)
+    }
+  }
+
+  // Use MutationObserver for DOM changes (works for most SPA sites)
+  new MutationObserver(() => {
+    if (urlCheckTimer !== null) {
+      clearTimeout(urlCheckTimer)
+    }
+    urlCheckTimer = window.setTimeout(checkUrlChange, 100)
+  }).observe(document.body, { childList: true, subtree: true })
+
+  // Also listen to popstate for browser navigation
+  window.addEventListener('popstate', () => {
+    setTimeout(checkUrlChange, 300)
+  })
+}
+
+init()

monkey/src/style.css

@@ -0,0 +1,169 @@
+/* VidBee Download Button Container */
+.vidbee-download-container {
+  position: fixed;
+  bottom: 16px;
+  right: 16px;
+  z-index: 9999;
+  transition: all 0.2s ease;
+  overflow: visible;
+}
+
+/* Hidden state */
+.vidbee-download-container.vidbee-hidden {
+  opacity: 0;
+  pointer-events: none;
+  transform: scale(0);
+}
+
+/* Main Download Button */
+.vidbee-download-button {
+  position: relative;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 36px;
+  height: 36px;
+  padding: 0;
+  background: rgba(0, 0, 0, 0.5);
+  backdrop-filter: blur(8px);
+  -webkit-backdrop-filter: blur(8px);
+  color: rgba(255, 255, 255, 0.8);
+  border: 1px solid rgba(255, 255, 255, 0.1);
+  border-radius: 50%;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
+  cursor: pointer;
+  font-size: 0;
+  transition: all 0.2s ease;
+  opacity: 0.6;
+  overflow: visible;
+}
+
+.vidbee-download-button:hover {
+  opacity: 1;
+  background: rgba(0, 0, 0, 0.7);
+  border-color: rgba(255, 255, 255, 0.2);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
+  transform: scale(1.1);
+}
+
+.vidbee-download-button:active {
+  transform: scale(0.95);
+}
+
+.vidbee-download-button svg {
+  flex-shrink: 0;
+  stroke: currentColor;
+  width: 16px;
+  height: 16px;
+}
+
+/* Tooltip */
+.vidbee-tooltip {
+  position: absolute;
+  right: calc(100% + 8px);
+  top: 50%;
+  padding: 6px 10px;
+  background: rgba(0, 0, 0, 0.9);
+  backdrop-filter: blur(8px);
+  -webkit-backdrop-filter: blur(8px);
+  color: white;
+  font-size: 12px;
+  font-weight: 500;
+  white-space: nowrap;
+  border-radius: 4px;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
+  opacity: 0;
+  pointer-events: none;
+  transition: opacity 0.2s ease, transform 0.2s ease;
+  transform: translateY(-50%) translateX(4px);
+  z-index: 10000;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+  line-height: 1;
+}
+
+.vidbee-tooltip::after {
+  content: '';
+  position: absolute;
+  left: 100%;
+  top: 50%;
+  transform: translateY(-50%);
+  border: 4px solid transparent;
+  border-left-color: rgba(0, 0, 0, 0.9);
+}
+
+.vidbee-download-button:hover .vidbee-tooltip {
+  opacity: 1;
+  transform: translateY(-50%) translateX(0);
+}
+
+/* Close Button - Hidden by default */
+.vidbee-close-button {
+  position: absolute;
+  top: -6px;
+  right: -6px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 18px;
+  height: 18px;
+  padding: 0;
+  background: rgba(255, 77, 77, 0.9);
+  backdrop-filter: blur(4px);
+  -webkit-backdrop-filter: blur(4px);
+  color: white;
+  border: 1px solid rgba(255, 255, 255, 0.2);
+  border-radius: 50%;
+  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
+  cursor: pointer;
+  font-size: 0;
+  transition: all 0.2s ease;
+  z-index: 1;
+  opacity: 0;
+  pointer-events: none;
+  overflow: visible;
+}
+
+/* Show close button on container hover */
+.vidbee-download-container:hover .vidbee-close-button {
+  opacity: 1;
+  pointer-events: auto;
+}
+
+.vidbee-close-button:hover {
+  background: rgba(255, 77, 77, 1);
+  transform: scale(1.15);
+  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.4);
+}
+
+.vidbee-close-button:active {
+  transform: scale(0.9);
+}
+
+.vidbee-close-button svg {
+  flex-shrink: 0;
+  stroke: currentColor;
+  width: 10px;
+  height: 10px;
+}
+
+/* Close button tooltip positioning */
+.vidbee-close-button .vidbee-tooltip {
+  right: calc(100% + 6px);
+  top: 50%;
+  left: auto;
+  transform: translateY(-50%) translateX(4px);
+}
+
+.vidbee-close-button .vidbee-tooltip::after {
+  left: 100%;
+  top: 50%;
+  right: auto;
+  transform: translateY(-50%);
+  border-left-color: rgba(0, 0, 0, 0.9);
+  border-top-color: transparent;
+}
+
+.vidbee-download-container:hover .vidbee-close-button:hover .vidbee-tooltip {
+  opacity: 1;
+  transform: translateY(-50%) translateX(0);
+}

monkey/src/vite-env.d.ts

@@ -0,0 +1,4 @@
+/// <reference types="vite/client" />
+/// <reference types="vite-plugin-monkey/client" />
+//// <reference types="vite-plugin-monkey/global" />
+/// <reference types="vite-plugin-monkey/style" />

monkey/tsconfig.json

@@ -0,0 +1,24 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "useDefineForClassFields": true,
+    "module": "ESNext",
+    "lib": ["ES2020", "DOM", "DOM.Iterable"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "isolatedModules": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["src"]
+}

monkey/tsconfig.node.json

@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+    "skipLibCheck": true,
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "strict": true,
+    "noEmit": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["vite.config.ts"]
+}

monkey/vite.config.ts

@@ -0,0 +1,67 @@
+import { defineConfig } from 'vite'
+import monkey from 'vite-plugin-monkey'
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [
+    monkey({
+      entry: 'src/main.ts',
+      userscript: {
+        icon: 'https://vidbee.org/favicon.svg',
+        namespace: 'vidbee',
+        match: [
+          // YouTube
+          'https://www.youtube.com/*',
+          'https://youtube.com/*',
+          'https://music.youtube.com/*',
+          // Bilibili (哔哩哔哩)
+          'https://www.bilibili.com/*',
+          'https://bilibili.com/*',
+          // TikTok
+          'https://www.tiktok.com/*',
+          'https://tiktok.com/*',
+          // Vimeo
+          'https://vimeo.com/*',
+          'https://www.vimeo.com/*',
+          // Dailymotion
+          'https://www.dailymotion.com/*',
+          'https://dailymotion.com/*',
+          // Twitch
+          'https://www.twitch.tv/*',
+          'https://twitch.tv/*',
+          // Twitter/X
+          'https://twitter.com/*',
+          'https://www.twitter.com/*',
+          'https://x.com/*',
+          'https://www.x.com/*',
+          // Instagram
+          'https://www.instagram.com/*',
+          'https://instagram.com/*',
+          // Facebook
+          'https://www.facebook.com/*',
+          'https://facebook.com/*',
+          'https://fb.com/*',
+          'https://www.fb.com/*',
+          // Reddit
+          'https://www.reddit.com/*',
+          'https://reddit.com/*',
+          // SoundCloud
+          'https://soundcloud.com/*',
+          'https://www.soundcloud.com/*',
+          // NicoNico
+          'https://www.nicovideo.jp/*',
+          'https://nicovideo.jp/*',
+          // Kick
+          'https://kick.com/*',
+          'https://www.kick.com/*',
+          // Bandcamp
+          'https://bandcamp.com/*',
+          'https://*.bandcamp.com/*',
+          // Mixcloud
+          'https://www.mixcloud.com/*',
+          'https://mixcloud.com/*'
+        ]
+      }
+    })
+  ]
+})

package.json

@@ -1,12 +1,13 @@
 {
   "name": "vidbee",
-  "version": "1.0.1",
+  "version": "1.2.0",
   "description": "A modern Electron application for downloading videos and audios",
   "main": "./out/main/index.js",
   "author": "VidBee",
   "homepage": "https://github.com/nexmoe/vidbee",
   "scripts": {
-    "check": "biome check --write . && pnpm run typecheck",
+    "check": "pnpm run check:i18n && biome check --write . && pnpm run typecheck",
+    "check:i18n": "node scripts/check-locales.js",
     "typecheck:node": "tsc --noEmit -p tsconfig.node.json --composite false",
     "typecheck:web": "tsc --noEmit -p tsconfig.web.json --composite false",
     "typecheck": "pnpm run typecheck:node && pnpm run typecheck:web",
@@ -15,10 +16,10 @@
     "build": "electron-vite build",
     "setup": "node scripts/setup-dev-binaries.js",
     "postinstall": "node scripts/setup-dev-binaries.js && electron-builder install-app-deps",
-    "build:unpack": "pnpm run build && electron-builder --dir",
-    "build:win": "node scripts/check-ytdlp.js win && pnpm run build && electron-builder --win",
-    "build:mac": "node scripts/check-ytdlp.js mac && pnpm run build && electron-builder --mac --x64 --arm64",
-    "build:linux": "node scripts/check-ytdlp.js linux && pnpm run build && electron-builder --linux",
+    "build:unpack": "pnpm run setup && pnpm run build && electron-builder --dir",
+    "build:win": "pnpm run setup && node scripts/check-ytdlp.js win && pnpm run build && electron-builder --win",
+    "build:mac": "pnpm run setup && node scripts/check-ytdlp.js mac && pnpm run build && electron-builder --mac --x64 --arm64",
+    "build:linux": "pnpm run setup && node scripts/check-ytdlp.js linux && pnpm run build && electron-builder --linux",
     "release": "git checkout main && git pull && pnpm run check && bumpp",
     "db:generate": "drizzle-kit generate"
   },
@@ -33,7 +34,9 @@
     "@radix-ui/react-dropdown-menu": "^2.1.16",
     "@radix-ui/react-hover-card": "^1.1.15",
     "@radix-ui/react-label": "^2.1.7",
+    "@radix-ui/react-popover": "^1.1.15",
     "@radix-ui/react-progress": "^1.1.7",
+    "@radix-ui/react-radio-group": "^1.3.8",
     "@radix-ui/react-scroll-area": "^1.2.10",
     "@radix-ui/react-select": "^2.2.6",
     "@radix-ui/react-separator": "^1.1.7",
@@ -47,6 +50,7 @@
     "better-sqlite3": "^12.4.1",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
+    "cmdk": "^1.1.1",
     "dayjs": "^1.11.18",
     "drizzle-orm": "^0.44.7",
     "electron-ipc-decorator": "^0.2.0",

pnpm-lock.yaml

@@ -38,9 +38,15 @@ importers:
       '@radix-ui/react-label':
         specifier: ^2.1.7
         version: 2.1.7(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      '@radix-ui/react-popover':
+        specifier: ^1.1.15
+        version: 1.1.15(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
       '@radix-ui/react-progress':
         specifier: ^1.1.7
         version: 1.1.7(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      '@radix-ui/react-radio-group':
+        specifier: ^1.3.8
+        version: 1.3.8(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
       '@radix-ui/react-scroll-area':
         specifier: ^1.2.10
         version: 1.2.10(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
@@ -80,6 +86,9 @@ importers:
       clsx:
         specifier: ^2.1.1
         version: 2.1.1
+      cmdk:
+        specifier: ^1.1.1
+        version: 1.1.1(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
       dayjs:
         specifier: ^1.11.18
         version: 1.11.18
@@ -999,6 +1008,19 @@ packages:
       '@types/react-dom':
         optional: true
 
+  '@radix-ui/react-popover@1.1.15':
+    resolution: {integrity: sha512-kr0X2+6Yy/vJzLYJUPCZEc8SfQcf+1COFoAqauJm74umQhta9M7lNJHP7QQS3vkvcGLQUbWpMzwrXYwrYztHKA==}
+    peerDependencies:
+      '@types/react': '*'
+      '@types/react-dom': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      '@types/react-dom':
+        optional: true
+
   '@radix-ui/react-popper@1.2.8':
     resolution: {integrity: sha512-0NJQ4LFFUuWkE7Oxf0htBKS6zLkkjBH+hM1uk7Ng705ReR8m/uelduy1DBo0PyBXPKVnBA6YBlU94MBGXrSBCw==}
     peerDependencies:
@@ -1064,6 +1086,19 @@ packages:
       '@types/react-dom':
         optional: true
 
+  '@radix-ui/react-radio-group@1.3.8':
+    resolution: {integrity: sha512-VBKYIYImA5zsxACdisNQ3BjCBfmbGH3kQlnFVqlWU4tXwjy7cGX8ta80BcrO+WJXIn5iBylEH3K6ZTlee//lgQ==}
+    peerDependencies:
+      '@types/react': '*'
+      '@types/react-dom': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      '@types/react-dom':
+        optional: true
+
   '@radix-ui/react-roving-focus@1.1.11':
     resolution: {integrity: sha512-7A6S9jSgm/S+7MdtNDSb+IU859vQqJ/QAtcYQcfFC6W8RS4IxIZDldLR0xqCFZ6DCyrQLjLPsxtTNch5jVA4lA==}
     peerDependencies:
@@ -1896,6 +1931,12 @@ packages:
     resolution: {integrity: sha512-eYm0QWBtUrBWZWG0d386OGAw16Z995PiOVo2B7bjWSbHedGl5e0ZWaq65kOGgUSNesEIDkB9ISbTg/JK9dhCZA==}
     engines: {node: '>=6'}
 
+  cmdk@1.1.1:
+    resolution: {integrity: sha512-Vsv7kFaXm+ptHDMZ7izaRsP70GgrW9NBNGswt9OZaVBLlE0SNpDq8eu/VGXyF9r7M0azK3Wy7OlYXsuyYLFzHg==}
+    peerDependencies:
+      react: ^18 || ^19 || ^19.0.0-rc
+      react-dom: ^18 || ^19 || ^19.0.0-rc
+
   color-convert@2.0.1:
     resolution: {integrity: sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==}
     engines: {node: '>=7.0.0'}
@@ -4481,6 +4522,29 @@ snapshots:
       '@types/react': 19.2.2
       '@types/react-dom': 19.2.2(@types/react@19.2.2)
 
+  '@radix-ui/react-popover@1.1.15(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)':
+    dependencies:
+      '@radix-ui/primitive': 1.1.3
+      '@radix-ui/react-compose-refs': 1.1.2(@types/react@19.2.2)(react@19.2.0)
+      '@radix-ui/react-context': 1.1.2(@types/react@19.2.2)(react@19.2.0)
+      '@radix-ui/react-dismissable-layer': 1.1.11(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      '@radix-ui/react-focus-guards': 1.1.3(@types/react@19.2.2)(react@19.2.0)
+      '@radix-ui/react-focus-scope': 1.1.7(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      '@radix-ui/react-id': 1.1.1(@types/react@19.2.2)(react@19.2.0)
+      '@radix-ui/react-popper': 1.2.8(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      '@radix-ui/react-portal': 1.1.9(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      '@radix-ui/react-presence': 1.1.5(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      '@radix-ui/react-slot': 1.2.3(@types/react@19.2.2)(react@19.2.0)
+      '@radix-ui/react-use-controllable-state': 1.2.2(@types/react@19.2.2)(react@19.2.0)
+      aria-hidden: 1.2.6
+      react: 19.2.0
+      react-dom: 19.2.0(react@19.2.0)
+      react-remove-scroll: 2.7.1(@types/react@19.2.2)(react@19.2.0)
+    optionalDependencies:
+      '@types/react': 19.2.2
+      '@types/react-dom': 19.2.2(@types/react@19.2.2)
+
   '@radix-ui/react-popper@1.2.8(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)':
     dependencies:
       '@floating-ui/react-dom': 2.1.6(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
@@ -4538,6 +4602,24 @@ snapshots:
       '@types/react': 19.2.2
       '@types/react-dom': 19.2.2(@types/react@19.2.2)
 
+  '@radix-ui/react-radio-group@1.3.8(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)':
+    dependencies:
+      '@radix-ui/primitive': 1.1.3
+      '@radix-ui/react-compose-refs': 1.1.2(@types/react@19.2.2)(react@19.2.0)
+      '@radix-ui/react-context': 1.1.2(@types/react@19.2.2)(react@19.2.0)
+      '@radix-ui/react-direction': 1.1.1(@types/react@19.2.2)(react@19.2.0)
+      '@radix-ui/react-presence': 1.1.5(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      '@radix-ui/react-roving-focus': 1.1.11(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      '@radix-ui/react-use-controllable-state': 1.2.2(@types/react@19.2.2)(react@19.2.0)
+      '@radix-ui/react-use-previous': 1.1.1(@types/react@19.2.2)(react@19.2.0)
+      '@radix-ui/react-use-size': 1.1.1(@types/react@19.2.2)(react@19.2.0)
+      react: 19.2.0
+      react-dom: 19.2.0(react@19.2.0)
+    optionalDependencies:
+      '@types/react': 19.2.2
+      '@types/react-dom': 19.2.2(@types/react@19.2.2)
+
   '@radix-ui/react-roving-focus@1.1.11(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)':
     dependencies:
       '@radix-ui/primitive': 1.1.3
@@ -5429,6 +5511,18 @@ snapshots:
 
   clsx@2.1.1: {}
 
+  cmdk@1.1.1(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0):
+    dependencies:
+      '@radix-ui/react-compose-refs': 1.1.2(@types/react@19.2.2)(react@19.2.0)
+      '@radix-ui/react-dialog': 1.1.15(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      '@radix-ui/react-id': 1.1.1(@types/react@19.2.2)(react@19.2.0)
+      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      react: 19.2.0
+      react-dom: 19.2.0(react@19.2.0)
+    transitivePeerDependencies:
+      - '@types/react'
+      - '@types/react-dom'
+
   color-convert@2.0.1:
     dependencies:
       color-name: 1.1.4

resources/.gitignore

@@ -6,6 +6,11 @@ ffmpeg.exe
 ffmpeg_macos
 ffmpeg_linux
 ffmpeg
+ffmpeg/
+ffprobe
+ffprobe.exe
+deno.exe
+deno
 
 # But keep the README
 !README.md

resources/README.md

@@ -48,24 +48,44 @@ Invoke-WebRequest -Uri "https://github.com/yt-dlp/yt-dlp/releases/latest/downloa
 Invoke-WebRequest -Uri "https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp" -OutFile "resources/yt-dlp_linux"
 ```
 
-## ffmpeg Binaries
+## ffmpeg/ffprobe Binaries
 
-ffmpeg is required for merging audio/video streams and audio extraction. Bundle the matching binary for each target platform:
+ffmpeg is required for merging audio/video streams and audio extraction. ffprobe is required for post-processing metadata. Bundle both binaries under `resources/ffmpeg/`.
 
 ### Required Files
 
-1. **Windows**: `ffmpeg.exe`
-2. **macOS**: `ffmpeg_macos`
-3. **Linux**: `ffmpeg_linux`
+1. **Windows**: `resources/ffmpeg/ffmpeg.exe` and `resources/ffmpeg/ffprobe.exe`
+2. **macOS**: `resources/ffmpeg/ffmpeg` and `resources/ffmpeg/ffprobe`
+3. **Linux**: `resources/ffmpeg/ffmpeg` and `resources/ffmpeg/ffprobe`
 
 ### How to Download
 
-- **Windows / Linux**: Grab static builds from <https://ffmpeg.org/download.html> (or <https://github.com/yt-dlp/FFmpeg-Builds/releases>) and rename the binary to match the filenames above.
-- **macOS**: Download the `ffmpeg-arm64*.zip` and `ffmpeg-x86_64*.zip` assets from <https://github.com/eko5624/mpv-mac/releases/latest>. Extract them and merge into a universal binary with `lipo -create`, then save the result as `resources/ffmpeg_macos`.
-- On macOS/Linux ensure the final binary is executable: `chmod +x resources/ffmpeg_macos` (or `ffmpeg_linux`).
+- **Windows / Linux**: Grab static builds from <https://ffmpeg.org/download.html> (or <https://github.com/yt-dlp/FFmpeg-Builds/releases>) and copy `ffmpeg` and `ffprobe` into `resources/ffmpeg/`.
+- **macOS**: Download the `ffmpeg-*.zip` asset from <https://github.com/eko5624/mpv-mac/releases/latest>, then copy `ffmpeg` and `ffprobe` from the archive into `resources/ffmpeg/`.
+- On macOS/Linux ensure both binaries are executable: `chmod +x resources/ffmpeg/ffmpeg resources/ffmpeg/ffprobe`.
 
 ### Note
 
-- Bundled binaries are required for Windows builds. On macOS/Linux the app can also use ffmpeg/yt-dlp from the system PATH.
-- You can override the lookup paths via the `YTDLP_PATH` or `FFMPEG_PATH` environment variables if you prefer custom locations.
-- File sizes: ~10-15 MB per yt-dlp binary, ~40-80 MB per ffmpeg binary
+- Bundled binaries are required for Windows builds. On macOS/Linux the app can also use ffmpeg/ffprobe from the system PATH.
+- You can override the lookup path via `FFMPEG_PATH`. It must point to a directory containing both `ffmpeg` and `ffprobe`.
+- File sizes: ~40-80 MB per ffmpeg build (ffmpeg + ffprobe)
+
+## JS Runtime (Deno)
+
+yt-dlp uses an external JS runtime (Deno by default) for some extractors. Bundle a Deno binary so the app can run without system dependencies.
+
+### Required Files
+
+1. **Windows**: `deno.exe`
+2. **macOS**: `deno`
+3. **Linux**: `deno`
+
+### How to Download
+
+- Visit: <https://github.com/denoland/deno/releases/latest>
+- Download the matching platform archive and extract the `deno` (or `deno.exe`) binary into `resources/`.
+- On macOS/Linux ensure the file is executable: `chmod +x resources/deno`
+
+### Note
+
+- You can override the runtime path via `YTDLP_JS_RUNTIME_PATH` if needed.

scripts/check-locales.js

@@ -0,0 +1,100 @@
+#!/usr/bin/env node
+
+const fs = require('node:fs')
+const path = require('node:path')
+
+const localesDir = path.join(__dirname, '..', 'src', 'renderer', 'src', 'locales')
+const baseLocaleFile = 'en.json'
+
+const readJson = (filePath) => {
+  try {
+    const raw = fs.readFileSync(filePath, 'utf8')
+    return JSON.parse(raw)
+  } catch (error) {
+    console.error(`ERROR: Failed to read ${filePath}`)
+    console.error(String(error))
+    process.exit(1)
+  }
+}
+
+const collectLeafKeys = (value, prefix = '', keys = new Set()) => {
+  if (value && typeof value === 'object' && !Array.isArray(value)) {
+    for (const [key, child] of Object.entries(value)) {
+      const next = prefix ? `${prefix}.${key}` : key
+      if (child && typeof child === 'object' && !Array.isArray(child)) {
+        collectLeafKeys(child, next, keys)
+      } else {
+        keys.add(next)
+      }
+    }
+    return keys
+  }
+
+  if (prefix) {
+    keys.add(prefix)
+  }
+
+  return keys
+}
+
+if (!fs.existsSync(localesDir)) {
+  console.error(`ERROR: Locales directory not found: ${localesDir}`)
+  process.exit(1)
+}
+
+const localeFiles = fs
+  .readdirSync(localesDir)
+  .filter((file) => file.endsWith('.json'))
+  .sort()
+
+if (!localeFiles.includes(baseLocaleFile)) {
+  console.error(`ERROR: Base locale file not found: ${baseLocaleFile}`)
+  process.exit(1)
+}
+
+const baseLocalePath = path.join(localesDir, baseLocaleFile)
+const baseLocaleData = readJson(baseLocalePath)
+const baseKeys = collectLeafKeys(baseLocaleData)
+
+let hasMissing = false
+let hasExtra = false
+
+for (const file of localeFiles) {
+  if (file === baseLocaleFile) {
+    continue
+  }
+
+  const localePath = path.join(localesDir, file)
+  const localeData = readJson(localePath)
+  const localeKeys = collectLeafKeys(localeData)
+
+  const missing = [...baseKeys].filter((key) => !localeKeys.has(key))
+  const extra = [...localeKeys].filter((key) => !baseKeys.has(key))
+
+  if (missing.length > 0) {
+    hasMissing = true
+    console.error(`ERROR: Missing keys in ${file}`)
+    for (const key of missing) {
+      console.error(`  - ${key}`)
+    }
+  }
+
+  if (extra.length > 0) {
+    hasExtra = true
+    console.warn(`WARN: Extra keys in ${file}`)
+    for (const key of extra) {
+      console.warn(`  - ${key}`)
+    }
+  }
+}
+
+if (hasMissing) {
+  process.exit(1)
+}
+
+if (hasExtra) {
+  console.log('INFO: No missing keys, but extra keys were found.')
+  process.exit(0)
+}
+
+console.log('OK: All locale files include every key from en.json.')

scripts/check-ytdlp.js

@@ -23,10 +23,10 @@ if (!supportedPlatforms.includes(platform)) {
 const binaries = [
   {
     label: 'yt-dlp',
-    filenameMap: {
-      win: 'yt-dlp.exe',
-      mac: 'yt-dlp_macos',
-      linux: 'yt-dlp_linux'
+    paths: {
+      win: ['yt-dlp.exe'],
+      mac: ['yt-dlp_macos'],
+      linux: ['yt-dlp_linux']
     },
     help: {
       default: 'https://github.com/yt-dlp/yt-dlp/releases/latest'
@@ -34,28 +34,55 @@ const binaries = [
   },
   {
     label: 'ffmpeg',
-    filenameMap: {
-      win: 'ffmpeg.exe',
-      mac: 'ffmpeg_macos',
-      linux: 'ffmpeg_linux'
+    paths: {
+      win: ['ffmpeg/ffmpeg.exe'],
+      mac: ['ffmpeg/ffmpeg'],
+      linux: ['ffmpeg/ffmpeg']
     },
     help: {
       win: 'https://ffmpeg.org/download.html',
       linux: 'https://ffmpeg.org/download.html',
       mac: 'https://github.com/eko5624/mpv-mac/releases/latest'
     }
+  },
+  {
+    label: 'ffprobe',
+    paths: {
+      win: ['ffmpeg/ffprobe.exe'],
+      mac: ['ffmpeg/ffprobe'],
+      linux: ['ffmpeg/ffprobe']
+    },
+    help: {
+      win: 'https://ffmpeg.org/download.html',
+      linux: 'https://ffmpeg.org/download.html',
+      mac: 'https://github.com/eko5624/mpv-mac/releases/latest'
+    }
+  },
+  {
+    label: 'deno',
+    paths: {
+      win: ['deno.exe'],
+      mac: ['deno'],
+      linux: ['deno']
+    },
+    help: {
+      default: 'https://github.com/denoland/deno/releases/latest'
+    }
   }
 ]
 
 let hasMissingBinary = false
 
 for (const binary of binaries) {
-  const filename = binary.filenameMap[platform]
-  const binaryPath = path.join(__dirname, '..', 'resources', filename)
+  const candidates = binary.paths[platform] || []
+  const found = candidates.find((filename) =>
+    fs.existsSync(path.join(__dirname, '..', 'resources', filename))
+  )
 
-  if (!fs.existsSync(binaryPath)) {
-    console.error(`❌ Error: resources/${filename} not found!`)
-    console.error(`Please download ${filename} to the resources/ directory first.`)
+  if (!found) {
+    const expected = candidates.length ? candidates.join(' or ') : binary.label
+    console.error(`❌ Error: resources/${expected} not found!`)
+    console.error(`Please download ${binary.label} to the resources/ directory first.`)
     const help =
       typeof binary.help === 'string' ? binary.help : binary.help[platform] || binary.help.default
     if (help) {
@@ -63,7 +90,7 @@ for (const binary of binaries) {
     }
     hasMissingBinary = true
   } else {
-    console.log(`✅ ${filename} found in resources/ directory`)
+    console.log(`✅ ${binary.label} found: resources/${found}`)
   }
 }
 

scripts/setup-dev-binaries.js

@@ -8,13 +8,17 @@
 const fs = require('node:fs')
 const path = require('node:path')
 const os = require('node:os')
-const { execSync } = require('node:child_process')
+const { execSync, spawnSync } = require('node:child_process')
 const https = require('node:https')
 const http = require('node:http')
 
 // Configuration
 const RESOURCES_DIR = path.join(__dirname, '..', 'resources')
+const FFMPEG_DIR = path.join(RESOURCES_DIR, 'ffmpeg')
 const YTDLP_BASE_URL = 'https://github.com/yt-dlp/yt-dlp/releases/latest/download'
+const DENO_BASE_URL = 'https://github.com/denoland/deno/releases/latest/download'
+const GITHUB_TOKEN =
+  process.env.GITHUB_TOKEN || process.env.GH_TOKEN || process.env.GITHUB_API_TOKEN
 
 // Platform configuration
 const PLATFORM_CONFIG = {
@@ -26,8 +30,15 @@ const PLATFORM_CONFIG = {
     ffmpeg: {
       url: 'https://github.com/yt-dlp/FFmpeg-Builds/releases/latest/download/ffmpeg-master-latest-win64-gpl.zip',
       innerPath: 'ffmpeg-master-latest-win64-gpl/bin/ffmpeg.exe',
+      ffprobeInnerPath: 'ffmpeg-master-latest-win64-gpl/bin/ffprobe.exe',
       output: 'ffmpeg.exe',
-      extract: 'unzip'
+      ffprobeOutput: 'ffprobe.exe',
+      extract: 'unzip',
+      release: {
+        repos: ['yt-dlp/FFmpeg-Builds', 'BtbN/FFmpeg-Builds'],
+        assetPattern: /ffmpeg-master-latest-win64-gpl\.zip$/i,
+        binaryName: 'ffmpeg.exe'
+      }
     }
   },
   darwin: {
@@ -38,16 +49,28 @@ const PLATFORM_CONFIG = {
     ffmpeg: {
       // For development, download only the architecture matching current system
       arm64: {
-        url: 'https://github.com/eko5624/mpv-mac/releases/download/2025-10-25/ffmpeg-arm64-defd5f3f64.zip',
+        url: 'https://github.com/eko5624/mpv-mac/releases/download/2026-01-12/ffmpeg-arm64-96e8f3b8cc.zip',
         innerPath: 'ffmpeg/ffmpeg',
-        output: 'ffmpeg_macos',
-        extract: 'unzip'
+        ffprobeInnerPath: 'ffmpeg/ffprobe',
+        output: 'ffmpeg',
+        ffprobeOutput: 'ffprobe',
+        extract: 'unzip',
+        release: {
+          repo: 'eko5624/mpv-mac',
+          assetPattern: /ffmpeg-arm64.*\.zip$/i
+        }
       },
       x64: {
-        url: 'https://github.com/eko5624/mpv-mac/releases/download/2025-10-25/ffmpeg-x86_64-defd5f3f64.zip',
+        url: 'https://github.com/eko5624/mpv-mac/releases/download/2026-01-12/ffmpeg-x86_64-96e8f3b8cc.zip',
         innerPath: 'ffmpeg/ffmpeg',
-        output: 'ffmpeg_macos',
-        extract: 'unzip'
+        ffprobeInnerPath: 'ffmpeg/ffprobe',
+        output: 'ffmpeg',
+        ffprobeOutput: 'ffprobe',
+        extract: 'unzip',
+        release: {
+          repo: 'eko5624/mpv-mac',
+          assetPattern: /ffmpeg-x86_64.*\.zip$/i
+        }
       }
     }
   },
@@ -59,8 +82,15 @@ const PLATFORM_CONFIG = {
     ffmpeg: {
       url: 'https://github.com/yt-dlp/FFmpeg-Builds/releases/latest/download/ffmpeg-master-latest-linux64-gpl.tar.xz',
       innerPath: 'ffmpeg-master-latest-linux64-gpl/bin/ffmpeg',
-      output: 'ffmpeg_linux',
-      extract: 'tar'
+      ffprobeInnerPath: 'ffmpeg-master-latest-linux64-gpl/bin/ffprobe',
+      output: 'ffmpeg',
+      ffprobeOutput: 'ffprobe',
+      extract: 'tar',
+      release: {
+        repos: ['yt-dlp/FFmpeg-Builds', 'BtbN/FFmpeg-Builds'],
+        assetPattern: /ffmpeg-master-latest-linux64-gpl\.tar\.xz$/i,
+        binaryName: 'ffmpeg'
+      }
     }
   }
 }
@@ -83,40 +113,180 @@ function ensureDir(dir) {
   }
 }
 
+function safeUnlink(filePath) {
+  if (fs.existsSync(filePath)) {
+    fs.unlinkSync(filePath)
+  }
+}
+
+function getDownloadHeaders(url) {
+  const headers = {
+    'User-Agent': 'vidbee-setup',
+    Accept: '*/*'
+  }
+  if (GITHUB_TOKEN && /github\.com|githubusercontent\.com/.test(url)) {
+    headers.Authorization = `Bearer ${GITHUB_TOKEN}`
+  }
+  return headers
+}
+
 function downloadFile(url, dest) {
   return new Promise((resolve, reject) => {
     const protocol = url.startsWith('https') ? https : http
     const file = fs.createWriteStream(dest)
+    let downloadedBytes = 0
+
+    const request = protocol.get(url, { headers: getDownloadHeaders(url) }, (response) => {
+      if (response.statusCode === 302 || response.statusCode === 301) {
+        // Handle redirect
+        file.close()
+        safeUnlink(dest)
+        const redirectUrl = response.headers.location
+        if (!redirectUrl) {
+          return reject(new Error(`Redirect without location for ${url}`))
+        }
+        log(`Redirected to ${redirectUrl}`, 'info')
+        return downloadFile(redirectUrl, dest).then(resolve).catch(reject)
+      }
+
+      const contentLength = response.headers['content-length']
+      if (response.statusCode !== 200) {
+        file.close()
+        safeUnlink(dest)
+        return reject(
+          new Error(
+            `Failed to download ${url}: ${response.statusCode} (length: ${contentLength || 'unknown'})`
+          )
+        )
+      }
+
+      response.on('data', (chunk) => {
+        downloadedBytes += chunk.length
+      })
+
+      response.pipe(file)
+      file.on('finish', () => {
+        file.close()
+        log(
+          `Downloaded ${formatBytes(downloadedBytes)} from ${url}`,
+          downloadedBytes ? 'success' : 'warn'
+        )
+        resolve()
+      })
+    })
+
+    request.setTimeout(30000, () => {
+      request.destroy(new Error('Download timeout'))
+    })
+
+    request.on('error', (err) => {
+      file.close()
+      safeUnlink(dest)
+      log(`Download error for ${url}: ${err.message}`, 'error')
+      reject(err)
+    })
+  })
+}
+
+async function downloadFileWithRetry(url, dest, retries = 3, delayMs = 2000) {
+  let lastError
+  for (let attempt = 1; attempt <= retries; attempt += 1) {
+    try {
+      log(`Downloading ${url} (attempt ${attempt}/${retries})...`, 'download')
+      await downloadFile(url, dest)
+      return
+    } catch (error) {
+      lastError = error
+      safeUnlink(dest)
+      if (attempt < retries) {
+        const backoff = delayMs * attempt
+        log(`Download failed for ${url} (attempt ${attempt}/${retries}): ${error.message}`, 'warn')
+        await new Promise((resolve) => setTimeout(resolve, backoff))
+      }
+    }
+  }
+  throw lastError
+}
+
+function fetchJson(url) {
+  return new Promise((resolve, reject) => {
+    const protocol = url.startsWith('https') ? https : http
+    const headers = {
+      'User-Agent': 'vidbee-setup',
+      Accept: 'application/vnd.github+json'
+    }
+    if (GITHUB_TOKEN) {
+      headers.Authorization = `Bearer ${GITHUB_TOKEN}`
+    }
 
     protocol
-      .get(url, (response) => {
+      .get(url, { headers }, (response) => {
         if (response.statusCode === 302 || response.statusCode === 301) {
-          // Handle redirect
-          file.close()
-          fs.unlinkSync(dest)
-          return downloadFile(response.headers.location, dest).then(resolve).catch(reject)
+          return fetchJson(response.headers.location).then(resolve).catch(reject)
         }
-
         if (response.statusCode !== 200) {
-          file.close()
-          fs.unlinkSync(dest)
-          return reject(new Error(`Failed to download: ${response.statusCode}`))
+          return reject(new Error(`Failed to fetch ${url}: ${response.statusCode}`))
         }
 
-        response.pipe(file)
-        file.on('finish', () => {
-          file.close()
-          resolve()
+        let body = ''
+        response.on('data', (chunk) => {
+          body += chunk
+        })
+        response.on('end', () => {
+          try {
+            resolve(JSON.parse(body))
+          } catch (error) {
+            reject(new Error(`Failed to parse JSON from ${url}: ${error.message}`))
+          }
         })
       })
       .on('error', (err) => {
-        file.close()
-        fs.unlinkSync(dest)
         reject(err)
       })
   })
 }
 
+function inferFfmpegInnerPath(assetName, binaryName) {
+  if (!assetName) {
+    return null
+  }
+  const match = assetName.match(/^(.*)\.(tar\.xz|zip)$/i)
+  if (!match) {
+    return null
+  }
+  return `${match[1]}/bin/${binaryName}`
+}
+
+async function resolveReleaseAsset(release) {
+  if (!release) {
+    return null
+  }
+  const repoCandidates = release.repos ?? (release.repo ? [release.repo] : [])
+  if (repoCandidates.length === 0) {
+    return null
+  }
+
+  let lastError
+  for (const repo of repoCandidates) {
+    try {
+      const data = await fetchJson(`https://api.github.com/repos/${repo}/releases/latest`)
+      const assets = Array.isArray(data.assets) ? data.assets : []
+      const match = assets.find((asset) => asset?.name && release.assetPattern.test(asset.name))
+      if (match?.browser_download_url) {
+        return { name: match.name, url: match.browser_download_url }
+      }
+      lastError = new Error(`No matching assets found in ${repo}`)
+    } catch (error) {
+      lastError = error
+    }
+  }
+
+  if (lastError) {
+    throw lastError
+  }
+  return null
+}
+
 function extractZip(zipPath, extractDir) {
   const platform = os.platform()
   ensureDir(extractDir)
@@ -158,12 +328,79 @@ function fileExists(filePath) {
   return fs.existsSync(filePath)
 }
 
+function formatBytes(bytes) {
+  if (!bytes || bytes <= 0) {
+    return 'unknown size'
+  }
+  if (bytes >= 1024 * 1024) {
+    return `${Math.round(bytes / (1024 * 1024))} MB`
+  }
+  return `${Math.round(bytes / 1024)} KB`
+}
+
+function checkBinary(filePath, args, label, options = {}) {
+  const timeoutMs =
+    typeof options.timeoutMs === 'number'
+      ? options.timeoutMs
+      : os.platform() === 'win32'
+        ? 20000
+        : 8000
+  const result = spawnSync(filePath, args, {
+    encoding: 'utf8',
+    timeout: timeoutMs,
+    windowsHide: true
+  })
+
+  if (result.error) {
+    return { ok: false, message: result.error.message, code: result.error.code }
+  }
+
+  if (result.status !== 0) {
+    const output = `${result.stdout || ''}\n${result.stderr || ''}`.trim()
+    return { ok: false, message: output || `exit code ${result.status}` }
+  }
+
+  const output = `${result.stdout || ''}\n${result.stderr || ''}`.trim()
+  const firstLine = output.split(/\r?\n/).find((line) => line.trim())
+  return { ok: true, message: firstLine ? firstLine.trim() : `${label} version check ok` }
+}
+
+function getDenoAssetName(platform, arch) {
+  if (platform === 'win32') {
+    if (arch === 'arm64') {
+      return 'deno-aarch64-pc-windows-msvc.zip'
+    }
+    return 'deno-x86_64-pc-windows-msvc.zip'
+  }
+  if (platform === 'darwin') {
+    if (arch === 'arm64') {
+      return 'deno-aarch64-apple-darwin.zip'
+    }
+    return 'deno-x86_64-apple-darwin.zip'
+  }
+  if (platform === 'linux') {
+    if (arch === 'arm64') {
+      return 'deno-aarch64-unknown-linux-gnu.zip'
+    }
+    return 'deno-x86_64-unknown-linux-gnu.zip'
+  }
+  return null
+}
+
+function getDenoOutputName(platform) {
+  return platform === 'win32' ? 'deno.exe' : 'deno'
+}
+
 // Main download functions
 async function downloadYtDlp(config) {
   const { asset, output } = config.ytdlp
   const outputPath = path.join(RESOURCES_DIR, output)
 
   if (fileExists(outputPath)) {
+    const validation = checkBinary(outputPath, ['--version'], 'yt-dlp')
+    if (!validation.ok) {
+      log(`Existing ${output} failed version check: ${validation.message}`, 'warn')
+    }
     log(`${output} already exists, skipping download`, 'info')
     return
   }
@@ -173,9 +410,14 @@ async function downloadYtDlp(config) {
   const tempPath = path.join(RESOURCES_DIR, `.${asset}.tmp`)
 
   try {
-    await downloadFile(url, tempPath)
+    await downloadFileWithRetry(url, tempPath)
     fs.renameSync(tempPath, outputPath)
     setExecutable(outputPath)
+    const validation = checkBinary(outputPath, ['--version'], 'yt-dlp')
+    if (!validation.ok) {
+      safeUnlink(outputPath)
+      throw new Error(`Downloaded ${output} failed version check: ${validation.message}`)
+    }
     log(`Downloaded ${output} successfully`, 'success')
   } catch (error) {
     if (fs.existsSync(tempPath)) {
@@ -186,20 +428,65 @@ async function downloadYtDlp(config) {
 }
 
 async function downloadFfmpegWindows(config) {
-  const { url, innerPath, output } = config.ffmpeg
-  const outputPath = path.join(RESOURCES_DIR, output)
+  const {
+    url: fallbackUrl,
+    innerPath: fallbackInnerPath,
+    ffprobeInnerPath: fallbackFfprobeInnerPath,
+    output,
+    ffprobeOutput,
+    release
+  } = config.ffmpeg
+  const outputPath = path.join(FFMPEG_DIR, output)
+  const ffprobeOutputPath = ffprobeOutput ? path.join(FFMPEG_DIR, ffprobeOutput) : null
 
-  if (fileExists(outputPath)) {
-    log(`${output} already exists, skipping download`, 'info')
-    return
+  const ffmpegExists = fileExists(outputPath)
+  const ffprobeExists = ffprobeOutputPath ? fileExists(ffprobeOutputPath) : true
+
+  if (ffmpegExists && ffprobeExists) {
+    const validation = checkBinary(outputPath, ['-version'], 'ffmpeg')
+    const ffprobeValidation = ffprobeOutputPath
+      ? checkBinary(ffprobeOutputPath, ['-version'], 'ffprobe')
+      : { ok: true }
+    if (!validation.ok || !ffprobeValidation.ok) {
+      log(
+        `Existing ffmpeg/ffprobe failed version check: ${validation.message || ffprobeValidation.message}`,
+        'warn'
+      )
+    } else {
+      log('ffmpeg and ffprobe already exist, skipping download', 'info')
+      return
+    }
   }
 
   log(`Downloading ffmpeg for Windows...`, 'download')
+  ensureDir(FFMPEG_DIR)
   const tempZip = path.join(RESOURCES_DIR, 'ffmpeg-temp.zip')
   const extractDir = path.join(RESOURCES_DIR, 'ffmpeg-temp')
+  let downloadUrl = fallbackUrl
+  let innerPath = fallbackInnerPath
+  let ffprobeInnerPath = fallbackFfprobeInnerPath
+
+  if (release) {
+    try {
+      const resolved = await resolveReleaseAsset(release)
+      if (resolved) {
+        downloadUrl = resolved.url
+        const inferred = inferFfmpegInnerPath(resolved.name, release.binaryName ?? 'ffmpeg.exe')
+        if (inferred) {
+          innerPath = inferred
+        }
+        const inferredFfprobe = inferFfmpegInnerPath(resolved.name, 'ffprobe.exe')
+        if (inferredFfprobe) {
+          ffprobeInnerPath = inferredFfprobe
+        }
+      }
+    } catch (error) {
+      log(`Failed to resolve latest ffmpeg asset: ${error.message}`, 'warn')
+    }
+  }
 
   try {
-    await downloadFile(url, tempZip)
+    await downloadFileWithRetry(downloadUrl, tempZip)
     log('Extracting ffmpeg...', 'info')
     extractZip(tempZip, extractDir)
 
@@ -209,7 +496,24 @@ async function downloadFfmpegWindows(config) {
     }
 
     fs.copyFileSync(sourcePath, outputPath)
-    log(`Downloaded ${output} successfully`, 'success')
+    if (ffprobeInnerPath && ffprobeOutputPath) {
+      const ffprobeSourcePath = path.join(extractDir, ffprobeInnerPath.replace(/\\/g, path.sep))
+      if (!fileExists(ffprobeSourcePath)) {
+        throw new Error(`ffprobe binary not found at ${ffprobeSourcePath}`)
+      }
+      fs.copyFileSync(ffprobeSourcePath, ffprobeOutputPath)
+    }
+    const validation = checkBinary(outputPath, ['-version'], 'ffmpeg')
+    if (!validation.ok) {
+      if (validation.code === 'ETIMEDOUT') {
+        log(`Downloaded ${output} version check timed out; keeping binary`, 'warn')
+      } else {
+        safeUnlink(outputPath)
+        throw new Error(`Downloaded ${output} failed version check: ${validation.message}`)
+      }
+    } else {
+      log(`Downloaded ${output} successfully`, 'success')
+    }
 
     // Cleanup
     fs.unlinkSync(tempZip)
@@ -229,20 +533,55 @@ async function downloadFfmpegMac(config) {
     throw new Error(`Unsupported architecture: ${arch}`)
   }
 
-  const { url, innerPath, output } = ffmpegConfig
-  const outputPath = path.join(RESOURCES_DIR, output)
+  const {
+    url: fallbackUrl,
+    innerPath,
+    ffprobeInnerPath,
+    output,
+    ffprobeOutput,
+    release
+  } = ffmpegConfig
+  const outputPath = path.join(FFMPEG_DIR, output)
+  const ffprobeOutputPath = ffprobeOutput ? path.join(FFMPEG_DIR, ffprobeOutput) : null
 
-  if (fileExists(outputPath)) {
-    log(`${output} already exists, skipping download`, 'info')
-    return
+  const ffmpegExists = fileExists(outputPath)
+  const ffprobeExists = ffprobeOutputPath ? fileExists(ffprobeOutputPath) : true
+
+  if (ffmpegExists && ffprobeExists) {
+    const validation = checkBinary(outputPath, ['-version'], 'ffmpeg')
+    const ffprobeValidation = ffprobeOutputPath
+      ? checkBinary(ffprobeOutputPath, ['-version'], 'ffprobe')
+      : { ok: true }
+    if (!validation.ok || !ffprobeValidation.ok) {
+      log(
+        `Existing ffmpeg/ffprobe failed version check: ${validation.message || ffprobeValidation.message}`,
+        'warn'
+      )
+    } else {
+      log('ffmpeg and ffprobe already exist, skipping download', 'info')
+      return
+    }
   }
 
   log(`Downloading ffmpeg for macOS (${arch})...`, 'download')
+  ensureDir(FFMPEG_DIR)
   const tempZip = path.join(RESOURCES_DIR, 'ffmpeg-temp.zip')
   const extractDir = path.join(RESOURCES_DIR, 'ffmpeg-temp')
+  let downloadUrl = fallbackUrl
+
+  if (release) {
+    try {
+      const resolved = await resolveReleaseAsset(release)
+      if (resolved) {
+        downloadUrl = resolved.url
+      }
+    } catch (error) {
+      log(`Failed to resolve latest ffmpeg asset: ${error.message}`, 'warn')
+    }
+  }
 
   try {
-    await downloadFile(url, tempZip)
+    await downloadFileWithRetry(downloadUrl, tempZip)
     log('Extracting ffmpeg...', 'info')
     extractZip(tempZip, extractDir)
 
@@ -253,6 +592,19 @@ async function downloadFfmpegMac(config) {
 
     fs.copyFileSync(sourcePath, outputPath)
     setExecutable(outputPath)
+    if (ffprobeInnerPath && ffprobeOutputPath) {
+      const ffprobeSourcePath = path.join(extractDir, ffprobeInnerPath)
+      if (!fileExists(ffprobeSourcePath)) {
+        throw new Error(`ffprobe binary not found at ${ffprobeSourcePath}`)
+      }
+      fs.copyFileSync(ffprobeSourcePath, ffprobeOutputPath)
+      setExecutable(ffprobeOutputPath)
+    }
+    const validation = checkBinary(outputPath, ['-version'], 'ffmpeg')
+    if (!validation.ok) {
+      safeUnlink(outputPath)
+      throw new Error(`Downloaded ${output} failed version check: ${validation.message}`)
+    }
     log(`Downloaded ${output} successfully`, 'success')
 
     // Cleanup
@@ -266,20 +618,65 @@ async function downloadFfmpegMac(config) {
 }
 
 async function downloadFfmpegLinux(config) {
-  const { url, innerPath, output } = config.ffmpeg
-  const outputPath = path.join(RESOURCES_DIR, output)
+  const {
+    url: fallbackUrl,
+    innerPath: fallbackInnerPath,
+    ffprobeInnerPath: fallbackFfprobeInnerPath,
+    output,
+    ffprobeOutput,
+    release
+  } = config.ffmpeg
+  const outputPath = path.join(FFMPEG_DIR, output)
+  const ffprobeOutputPath = ffprobeOutput ? path.join(FFMPEG_DIR, ffprobeOutput) : null
 
-  if (fileExists(outputPath)) {
-    log(`${output} already exists, skipping download`, 'info')
-    return
+  const ffmpegExists = fileExists(outputPath)
+  const ffprobeExists = ffprobeOutputPath ? fileExists(ffprobeOutputPath) : true
+
+  if (ffmpegExists && ffprobeExists) {
+    const validation = checkBinary(outputPath, ['-version'], 'ffmpeg')
+    const ffprobeValidation = ffprobeOutputPath
+      ? checkBinary(ffprobeOutputPath, ['-version'], 'ffprobe')
+      : { ok: true }
+    if (!validation.ok || !ffprobeValidation.ok) {
+      log(
+        `Existing ffmpeg/ffprobe failed version check: ${validation.message || ffprobeValidation.message}`,
+        'warn'
+      )
+    } else {
+      log('ffmpeg and ffprobe already exist, skipping download', 'info')
+      return
+    }
   }
 
   log(`Downloading ffmpeg for Linux...`, 'download')
+  ensureDir(FFMPEG_DIR)
   const tempTar = path.join(RESOURCES_DIR, 'ffmpeg-temp.tar.xz')
   const extractDir = path.join(RESOURCES_DIR, 'ffmpeg-temp')
+  let downloadUrl = fallbackUrl
+  let innerPath = fallbackInnerPath
+  let ffprobeInnerPath = fallbackFfprobeInnerPath
+
+  if (release) {
+    try {
+      const resolved = await resolveReleaseAsset(release)
+      if (resolved) {
+        downloadUrl = resolved.url
+        const inferred = inferFfmpegInnerPath(resolved.name, release.binaryName ?? 'ffmpeg')
+        if (inferred) {
+          innerPath = inferred
+        }
+        const inferredFfprobe = inferFfmpegInnerPath(resolved.name, 'ffprobe')
+        if (inferredFfprobe) {
+          ffprobeInnerPath = inferredFfprobe
+        }
+      }
+    } catch (error) {
+      log(`Failed to resolve latest ffmpeg asset: ${error.message}`, 'warn')
+    }
+  }
 
   try {
-    await downloadFile(url, tempTar)
+    await downloadFileWithRetry(downloadUrl, tempTar)
     log('Extracting ffmpeg...', 'info')
     extractTarXz(tempTar, extractDir)
 
@@ -290,6 +687,19 @@ async function downloadFfmpegLinux(config) {
 
     fs.copyFileSync(sourcePath, outputPath)
     setExecutable(outputPath)
+    if (ffprobeInnerPath && ffprobeOutputPath) {
+      const ffprobeSourcePath = path.join(extractDir, ffprobeInnerPath)
+      if (!fileExists(ffprobeSourcePath)) {
+        throw new Error(`ffprobe binary not found at ${ffprobeSourcePath}`)
+      }
+      fs.copyFileSync(ffprobeSourcePath, ffprobeOutputPath)
+      setExecutable(ffprobeOutputPath)
+    }
+    const validation = checkBinary(outputPath, ['-version'], 'ffmpeg')
+    if (!validation.ok) {
+      safeUnlink(outputPath)
+      throw new Error(`Downloaded ${output} failed version check: ${validation.message}`)
+    }
     log(`Downloaded ${output} successfully`, 'success')
 
     // Cleanup
@@ -302,6 +712,61 @@ async function downloadFfmpegLinux(config) {
   }
 }
 
+async function downloadDenoRuntime() {
+  const platform = os.platform()
+  const arch = os.arch()
+  const assetName = getDenoAssetName(platform, arch)
+
+  if (!assetName) {
+    log(`Skipping Deno runtime: unsupported platform/arch ${platform}/${arch}`, 'warn')
+    return
+  }
+
+  const outputName = getDenoOutputName(platform)
+  const outputPath = path.join(RESOURCES_DIR, outputName)
+
+  if (fileExists(outputPath)) {
+    const validation = checkBinary(outputPath, ['--version'], 'deno')
+    if (!validation.ok) {
+      log(`Existing ${outputName} failed version check: ${validation.message}`, 'warn')
+    }
+    log(`${outputName} already exists, skipping download`, 'info')
+    return
+  }
+
+  log(`Downloading Deno runtime (${platform}/${arch})...`, 'download')
+  const tempZip = path.join(RESOURCES_DIR, 'deno-temp.zip')
+  const extractDir = path.join(RESOURCES_DIR, 'deno-temp')
+  const downloadUrl = `${DENO_BASE_URL}/${assetName}`
+
+  try {
+    await downloadFileWithRetry(downloadUrl, tempZip)
+    log('Extracting Deno runtime...', 'info')
+    extractZip(tempZip, extractDir)
+
+    const sourcePath = path.join(extractDir, outputName)
+    if (!fileExists(sourcePath)) {
+      throw new Error(`Deno binary not found at ${sourcePath}`)
+    }
+
+    fs.copyFileSync(sourcePath, outputPath)
+    setExecutable(outputPath)
+    const validation = checkBinary(outputPath, ['--version'], 'deno')
+    if (!validation.ok) {
+      safeUnlink(outputPath)
+      throw new Error(`Downloaded ${outputName} failed version check: ${validation.message}`)
+    }
+    log(`Downloaded ${outputName} successfully`, 'success')
+
+    fs.unlinkSync(tempZip)
+    fs.rmSync(extractDir, { recursive: true, force: true })
+  } catch (error) {
+    if (fs.existsSync(tempZip)) fs.unlinkSync(tempZip)
+    if (fs.existsSync(extractDir)) fs.rmSync(extractDir, { recursive: true, force: true })
+    throw error
+  }
+}
+
 // Main setup function
 async function setup() {
   const platform = os.platform()
@@ -319,6 +784,9 @@ async function setup() {
     // Download yt-dlp
     await downloadYtDlp(config)
 
+    // Download JS runtime (Deno)
+    await downloadDenoRuntime()
+
     // Download ffmpeg
     if (platform === 'win32') {
       await downloadFfmpegWindows(config)

src/main/config/logger-config.ts

@@ -5,15 +5,6 @@ import log from 'electron-log/main'
  * Set log format, file path, transport methods, etc.
  */
 export function configureLogger() {
-  // Configure console output format - support colors and scope, time in gray
-  log.transports.console.format = '%c{h}:{i}:{s}%c [{level}]{scope} {text}'
-
-  // Enable console colors
-  log.transports.console.useStyles = true
-
-  // Configure file output format - include scope information
-  log.transports.file.format = '[{y}-{m}-{d} {h}:{i}:{s}] [{level}] {scope} {text}'
-
   // Set log levels
   // Development: show all logs
   // Production: show info level and above only

src/main/download-engine/args-builder.ts

@@ -1,27 +1,47 @@
 import path from 'node:path'
 import type { AppSettings, DownloadOptions } from '../../shared/types'
+import { resolvePathWithHome } from '../utils/path-helpers'
 
 export const sanitizeFilenameTemplate = (template: string): string => {
   const trimmed = template.trim()
-  const sanitized = trimmed.replace(/[/\\]+/g, '-')
-  return sanitized === '' ? '%(title)s via VidBee.%(ext)s' : sanitized
+  if (!trimmed) {
+    return '%(title)s via VidBee.%(ext)s'
+  }
+  const normalized = trimmed.replace(/\\/g, '/')
+  const safeParts = normalized
+    .split('/')
+    .map((part) => part.trim())
+    .filter((part) => part !== '' && part !== '.' && part !== '..')
+    .map((part) => part.replace(/[<>:"|?*]/g, '-').replace(/[. ]+$/g, ''))
+    .filter((part) => part !== '')
+  return safeParts.length === 0 ? '%(title)s via VidBee.%(ext)s' : safeParts.join('/')
 }
 
 export const resolveVideoFormatSelector = (options: DownloadOptions): string => {
   const format = options.format
   const audioFormat = options.audioFormat
+  const audioFormatIds = (options.audioFormatIds ?? []).filter((id) => id.trim() !== '')
 
-  if (format && (format.includes('/') || (audioFormat === undefined && format.includes('+')))) {
+  if (format && audioFormat === '') {
     return format
   }
 
+  if (format && (format.includes('/') || format.includes('+') || format.includes('['))) {
+    return format
+  }
+
+  if (audioFormatIds.length > 0) {
+    const baseVideo = format && format !== 'best' ? format : 'bestvideo*'
+    return `${baseVideo}+${audioFormatIds.join('+')}`
+  }
+
   if (!format || format === 'best') {
     if (audioFormat === 'none') {
       return 'bestvideo+none'
     }
     if (!audioFormat || audioFormat === 'best') {
-      // Use bestvideo+bestaudio to ensure video and audio are merged into a single file
-      return 'bestvideo+bestaudio'
+      // Prefer merged formats, but allow single-file "best" for sites without separate streams.
+      return 'bestvideo+bestaudio/best'
     }
     return `bestvideo+${audioFormat}`
   }
@@ -48,12 +68,29 @@ export const resolveAudioFormatSelector = (options: DownloadOptions): string =>
   return format
 }
 
+const isBilibiliUrl = (url: string): boolean => {
+  try {
+    const host = new URL(url).hostname.toLowerCase()
+    return (
+      host === 'bilibili.com' ||
+      host.endsWith('.bilibili.com') ||
+      host === 'b23.tv' ||
+      host.endsWith('.b23.tv') ||
+      host === 'bili.tv' ||
+      host.endsWith('.bili.tv')
+    )
+  } catch {
+    return false
+  }
+}
+
 export const buildDownloadArgs = (
   options: DownloadOptions,
   downloadPath: string,
-  settings: AppSettings
+  settings: AppSettings,
+  jsRuntimeArgs: string[] = []
 ): string[] => {
-  const args: string[] = ['--no-playlist', '--embed-chapters', '--no-mtime']
+  const args: string[] = ['--no-playlist', '--no-mtime']
 
   // Add encoding support for proper handling of non-ASCII characters
   args.push('--encoding', 'utf-8')
@@ -62,15 +99,16 @@ export const buildDownloadArgs = (
   if (options.type === 'video') {
     const formatSelector = resolveVideoFormatSelector(options)
     args.push('-f', formatSelector)
+    if (options.audioFormatIds && options.audioFormatIds.length > 0) {
+      args.push('--audio-multistreams')
+    } else if (formatSelector.includes('mergeall')) {
+      args.push('--audio-multistreams')
+    }
     // Let yt-dlp automatically choose the best merge format (mkv/webm/mp4)
     // based on codec compatibility. Forcing MP4 can cause failures
     // when codecs are incompatible (e.g., VP9+Opus requires mkv/webm)
   } else if (options.type === 'audio') {
     args.push('-f', resolveAudioFormatSelector(options))
-  } else if (options.type === 'extract') {
-    args.push('-x')
-    args.push('--audio-format', options.extractFormat || 'mp3')
-    args.push('--audio-quality', options.extractQuality || '5')
   }
 
   // Time range
@@ -80,10 +118,28 @@ export const buildDownloadArgs = (
     args.push('--download-sections', `*${start}-${end || ''}`)
   }
 
+  const embedSubs = settings.embedSubs
+  const embedMetadata = settings.embedMetadata
+  const embedChapters = settings.embedChapters
+  const hasSubtitleAuth =
+    (settings.browserForCookies && settings.browserForCookies !== 'none') ||
+    Boolean(settings.cookiesPath?.trim())
+  const shouldAttemptSubtitles = !isBilibiliUrl(options.url) || hasSubtitleAuth
+
   // Subtitles
-  if (options.downloadSubs) {
-    args.push('--write-subs', '--sub-langs', 'all')
+  if (shouldAttemptSubtitles) {
+    if (embedSubs) {
+      args.push('--sub-langs', 'all')
+    } else {
+      args.push('--write-subs')
+    }
+    args.push(embedSubs ? '--embed-subs' : '--no-embed-subs')
+  } else {
+    args.push('--no-embed-subs')
   }
+  args.push(settings.embedThumbnail ? '--embed-thumbnail' : '--no-embed-thumbnail')
+  args.push(embedMetadata ? '--embed-metadata' : '--no-embed-metadata')
+  args.push(embedChapters ? '--embed-chapters' : '--no-embed-chapters')
 
   // Output path with proper encoding handling
   const baseDownloadPath = options.customDownloadPath?.trim() || downloadPath
@@ -94,8 +150,8 @@ export const buildDownloadArgs = (
   const outputTemplate = path.join(baseDownloadPath, safeTemplate)
   args.push('-o', outputTemplate)
 
-  // Add options for better filename handling
-  args.push('--no-part')
+  // Allow resume support across restarts
+  args.push('--continue')
   args.push('--no-playlist-reverse')
 
   if (process.platform === 'win32') {
@@ -115,8 +171,13 @@ export const buildDownloadArgs = (
     args.push('--proxy', settings.proxy)
   }
 
-  if (settings.configPath) {
-    args.push('--config-location', settings.configPath)
+  const configPath = resolvePathWithHome(settings.configPath)
+  if (configPath) {
+    args.push('--config-location', configPath)
+  }
+
+  if (jsRuntimeArgs.length > 0) {
+    args.push(...jsRuntimeArgs)
   }
 
   args.push(options.url)

src/main/download-engine/format-utils.ts

@@ -194,7 +194,7 @@ export const resolveSelectedFormat = (
     return selectVideoFormatForPreset(videoFormats, preset)
   }
 
-  if (options.type === 'audio' || options.type === 'extract') {
+  if (options.type === 'audio') {
     const audioFormats = formats.filter(
       (format) =>
         !!format.acodec &&

src/main/index.ts

@@ -1,6 +1,15 @@
-import { join } from 'node:path'
+import { existsSync } from 'node:fs'
+import { isAbsolute, join, relative, resolve } from 'node:path'
 import { electronApp, optimizer } from '@electron-toolkit/utils'
-import { app, BrowserWindow, type BrowserWindowConstructorOptions, shell } from 'electron'
+import { APP_PROTOCOL, APP_PROTOCOL_SCHEME } from '@shared/constants'
+import {
+  app,
+  BrowserWindow,
+  type BrowserWindowConstructorOptions,
+  ipcMain,
+  protocol,
+  shell
+} from 'electron'
 import log from 'electron-log/main'
 import { autoUpdater } from 'electron-updater'
 import appIcon from '../../build/icon.png?asset'
@@ -11,6 +20,7 @@ import { ffmpegManager } from './lib/ffmpeg-manager'
 import { subscriptionManager } from './lib/subscription-manager'
 import { subscriptionScheduler } from './lib/subscription-scheduler'
 import { ytdlpManager } from './lib/ytdlp-manager'
+import { startExtensionApiServer, stopExtensionApiServer } from './local-api'
 import { settingsManager } from './settings'
 import { createTray, destroyTray } from './tray'
 import { applyAutoLaunchSetting } from './utils/auto-launch'
@@ -22,8 +32,103 @@ log.initialize()
 // Configure logger settings
 configureLogger()
 
+const RENDERER_DIST_PATH = join(__dirname, '../renderer')
+
+protocol.registerSchemesAsPrivileged([
+  {
+    scheme: APP_PROTOCOL,
+    privileges: {
+      secure: true,
+      standard: true,
+      supportFetchAPI: true
+    }
+  }
+])
+
 let mainWindow: BrowserWindow | null = null
 let isQuitting = false
+interface DeepLinkData {
+  url: string
+  type: 'single' | 'playlist'
+}
+const pendingDeepLinkUrls: DeepLinkData[] = []
+let isRendererReady = false
+
+const parseDownloadDeepLink = (rawUrl: string): DeepLinkData | null => {
+  try {
+    const parsed = new URL(rawUrl)
+    if (parsed.protocol !== `${APP_PROTOCOL}:`) {
+      return null
+    }
+
+    const host = parsed.hostname
+    const path = parsed.pathname.replace(/^\/+/, '')
+    const isDownloadLink = host === 'download' || path.startsWith('download')
+    if (!isDownloadLink) {
+      return null
+    }
+
+    const targetUrl = parsed.searchParams.get('url')
+    if (!targetUrl || !targetUrl.trim()) {
+      return null
+    }
+
+    const typeParam = parsed.searchParams.get('type')
+    const type = typeParam === 'playlist' ? 'playlist' : 'single'
+
+    return {
+      url: targetUrl.trim(),
+      type
+    }
+  } catch (error) {
+    log.warn('Failed to parse deep link:', error)
+    return null
+  }
+}
+
+const deliverDeepLink = (data: DeepLinkData): void => {
+  if (!mainWindow || !isRendererReady) {
+    pendingDeepLinkUrls.push(data)
+    return
+  }
+
+  if (mainWindow.isMinimized()) {
+    mainWindow.restore()
+  }
+  if (!mainWindow.isVisible()) {
+    mainWindow.show()
+  }
+  mainWindow.focus()
+  mainWindow.webContents.send('download:deeplink', data)
+}
+
+const flushPendingDeepLinks = (): void => {
+  if (!mainWindow || !isRendererReady || pendingDeepLinkUrls.length === 0) {
+    return
+  }
+
+  const pending = pendingDeepLinkUrls.splice(0, pendingDeepLinkUrls.length)
+  for (const data of pending) {
+    mainWindow.webContents.send('download:deeplink', data)
+  }
+}
+
+const handleDeepLinkUrl = (rawUrl: string): void => {
+  const data = parseDownloadDeepLink(rawUrl)
+  if (!data) {
+    log.warn('Ignored unsupported deep link:', rawUrl)
+    return
+  }
+  deliverDeepLink(data)
+}
+
+const handleDeepLinkArgv = (argv: string[]): void => {
+  for (const arg of argv) {
+    if (arg.startsWith(`${APP_PROTOCOL}://`)) {
+      handleDeepLinkUrl(arg)
+    }
+  }
+}
 
 subscriptionManager.on('subscriptions:updated', (subscriptions) => {
   mainWindow?.webContents.send('subscriptions:updated', subscriptions)
@@ -32,6 +137,7 @@ subscriptionManager.on('subscriptions:updated', (subscriptions) => {
 export function createWindow(): void {
   const isMac = process.platform === 'darwin'
   const isWindows = process.platform === 'win32'
+  const shouldStartHidden = isWindows && app.getLoginItemSettings().wasOpenedAtLogin
 
   const windowOptions: BrowserWindowConstructorOptions = {
     width: 1200,
@@ -71,6 +177,9 @@ export function createWindow(): void {
   })
 
   mainWindow.on('ready-to-show', () => {
+    if (shouldStartHidden) {
+      return
+    }
     mainWindow?.show()
   })
 
@@ -84,17 +193,57 @@ export function createWindow(): void {
   if (process.env.ELECTRON_RENDERER_URL) {
     mainWindow.loadURL(process.env.ELECTRON_RENDERER_URL)
   } else {
-    mainWindow.loadFile(join(__dirname, '../renderer/index.html'))
+    mainWindow.loadURL(`${APP_PROTOCOL_SCHEME}renderer/index.html`)
   }
 
   mainWindow.webContents.on('did-finish-load', () => {
     mainWindow?.webContents.send('subscriptions:updated', subscriptionManager.getAll())
+    isRendererReady = true
+    flushPendingDeepLinks()
   })
 
+  // Setup error handling for renderer process
+  setupRendererErrorHandling()
+
   // Setup download engine event forwarding to renderer
   setupDownloadEvents()
 }
 
+function setupRendererErrorHandling(): void {
+  if (!mainWindow) return
+
+  // Handle uncaught exceptions in renderer process
+  mainWindow.webContents.on('unresponsive', () => {
+    log.error('Renderer process became unresponsive')
+  })
+
+  mainWindow.webContents.on('responsive', () => {
+    log.info('Renderer process became responsive again')
+  })
+
+  // Listen for renderer errors via IPC
+  ipcMain.on('error:renderer', (_event, errorData) => {
+    log.error('Renderer error received:', errorData)
+
+    // Log detailed error information
+    if (errorData.error) {
+      log.error('Error name:', errorData.error.name)
+      log.error('Error message:', errorData.error.message)
+      if (errorData.error.stack) {
+        log.error('Error stack:', errorData.error.stack)
+      }
+    }
+
+    if (errorData.errorInfo?.componentStack) {
+      log.error('Component stack:', errorData.errorInfo.componentStack)
+    }
+
+    if (errorData.context) {
+      log.error('Error context:', errorData.context)
+    }
+  })
+}
+
 function setupDownloadEvents(): void {
   downloadEngine.on('download-started', (id: string) => {
     mainWindow?.webContents.send('download:started', id)
@@ -117,6 +266,66 @@ function setupDownloadEvents(): void {
   })
 }
 
+function sanitizeRequestPath(requestUrl: URL): string {
+  const rawPath = `${requestUrl.hostname}${decodeURIComponent(requestUrl.pathname)}`
+  const trimmedLeading = rawPath.replace(/^\/+/, '')
+  const cleaned = trimmedLeading.replace(/\/+$/, '')
+  return cleaned || 'index.html'
+}
+
+function isWithinBase(targetPath: string, basePath: string): boolean {
+  const relativePath = relative(basePath, targetPath)
+  return !relativePath.startsWith('..') && !isAbsolute(relativePath)
+}
+
+function resolveVidbeeFilePath(requestUrl: URL, userDataPath: string): string | null {
+  const sanitizedPath = sanitizeRequestPath(requestUrl)
+  const [rootSegment, ...restSegments] = sanitizedPath.split('/')
+  const rendererPath = restSegments.join('/') || 'index.html'
+
+  if (rootSegment === 'renderer') {
+    const rendererTarget = resolve(RENDERER_DIST_PATH, rendererPath)
+
+    if (isWithinBase(rendererTarget, RENDERER_DIST_PATH) && existsSync(rendererTarget)) {
+      return rendererTarget
+    }
+  }
+
+  const userDataTarget = resolve(userDataPath, sanitizedPath)
+
+  if (isWithinBase(userDataTarget, userDataPath) && existsSync(userDataTarget)) {
+    return userDataTarget
+  }
+
+  const rendererFallback = resolve(RENDERER_DIST_PATH, sanitizedPath)
+
+  if (isWithinBase(rendererFallback, RENDERER_DIST_PATH) && existsSync(rendererFallback)) {
+    return rendererFallback
+  }
+
+  return null
+}
+
+function registerVidbeeProtocol(): void {
+  try {
+    const userDataPath = app.getPath('userData')
+    protocol.registerFileProtocol(APP_PROTOCOL, (request, callback) => {
+      const requestUrl = new URL(request.url)
+      const filePath = resolveVidbeeFilePath(requestUrl, userDataPath)
+
+      if (!filePath) {
+        log.error(`File not found for ${request.url}`)
+        callback({ error: -6 })
+        return
+      }
+
+      callback(filePath)
+    })
+  } catch (error) {
+    log.error(`Failed to register ${APP_PROTOCOL} protocol:`, error)
+  }
+}
+
 function initAutoUpdater(): void {
   try {
     log.info('Initializing auto-updater...')
@@ -155,14 +364,6 @@ function initAutoUpdater(): void {
     autoUpdater.on('update-downloaded', (info) => {
       log.info('Update downloaded:', info.version)
       mainWindow?.webContents.send('update:downloaded', info)
-
-      if (mainWindow) {
-        mainWindow.webContents.send('update:show-notification', {
-          title: 'Update Ready',
-          body: `Version ${info.version} has been downloaded and will be installed on restart.`,
-          icon: 'app-icon'
-        })
-      }
     })
 
     log.info('Auto-updater initialized successfully')
@@ -182,6 +383,28 @@ function initAutoUpdater(): void {
   }
 }
 
+const gotSingleInstanceLock = app.requestSingleInstanceLock()
+
+if (!gotSingleInstanceLock) {
+  app.quit()
+} else {
+  app.on('second-instance', (_event, argv) => {
+    handleDeepLinkArgv(argv)
+    if (mainWindow) {
+      if (mainWindow.isMinimized()) {
+        mainWindow.restore()
+      }
+      mainWindow.show()
+      mainWindow.focus()
+    }
+  })
+}
+
+app.on('open-url', (event, url) => {
+  event.preventDefault()
+  handleDeepLinkUrl(url)
+})
+
 // This method will be called when Electron has finished
 // initialization and is ready to create browser windows.
 // Some APIs can only be used after this event occurs.
@@ -189,10 +412,28 @@ app.whenReady().then(async () => {
   // Set app user model id for windows
   electronApp.setAppUserModelId('com.vidbee')
 
+  registerVidbeeProtocol()
+
+  const registered = app.setAsDefaultProtocolClient(APP_PROTOCOL)
+  if (!registered) {
+    log.warn(`Failed to register ${APP_PROTOCOL} protocol handler`)
+  }
+
   // Default open or close DevTools by F12 in development
   // and ignore CommandOrControl + R in production.
   app.on('browser-window-created', (_, window) => {
     optimizer.watchWindowShortcuts(window)
+
+    // Enable F12 to toggle DevTools in both development and production
+    window.webContents.on('before-input-event', (_, input) => {
+      if (input.key === 'F12') {
+        if (window.webContents.isDevToolsOpened()) {
+          window.webContents.closeDevTools()
+        } else {
+          window.webContents.openDevTools()
+        }
+      }
+    })
   })
 
   // IPC services are automatically registered by electron-ipc-decorator when imported
@@ -208,14 +449,22 @@ app.whenReady().then(async () => {
   }
 
   // Initialize yt-dlp
+  let ytdlpReady = false
   try {
     log.info('Initializing yt-dlp...')
     await ytdlpManager.initialize()
+    ytdlpReady = true
     log.info('yt-dlp initialized successfully')
   } catch (error) {
     log.error('Failed to initialize yt-dlp:', error)
   }
 
+  if (ytdlpReady) {
+    downloadEngine.restoreActiveDownloads()
+  }
+
+  await startExtensionApiServer()
+
   applyDockVisibility(settingsManager.get('hideDockIcon'))
   applyAutoLaunchSetting(settingsManager.get('launchAtLogin'))
 
@@ -228,15 +477,30 @@ app.whenReady().then(async () => {
 
   subscriptionScheduler.start()
 
+  handleDeepLinkArgv(process.argv)
+
   app.on('activate', () => {
+    const existingWindow = BrowserWindow.getAllWindows().find((window) => !window.isDestroyed())
+    if (existingWindow) {
+      if (existingWindow.isMinimized()) {
+        existingWindow.restore()
+      }
+      if (!existingWindow.isVisible()) {
+        existingWindow.show()
+      }
+      existingWindow.focus()
+      return
+    }
+
     // On macOS it's common to re-create a window in the app when the
     // dock icon is clicked and there are no other windows open.
-    if (BrowserWindow.getAllWindows().length === 0) createWindow()
+    createWindow()
   })
 })
 
 app.on('before-quit', () => {
   isQuitting = true
+  downloadEngine.flushDownloadSession()
 })
 
 // Quit when all windows are closed, except on macOS. There, it's common
@@ -261,6 +525,7 @@ app.on('window-all-closed', () => {
 // Cleanup tray on quit
 app.on('will-quit', () => {
   destroyTray()
+  void stopExtensionApiServer()
 })
 
 // In this file you can include the rest of your app's specific main process

src/main/ipc/index.ts

@@ -1,5 +1,6 @@
 import { createServices, type MergeIpcService } from 'electron-ipc-decorator'
 import { AppService } from './services/app-service'
+import { BrowserCookiesService } from './services/browser-cookies-service'
 import { DownloadService } from './services/download-service'
 import { FileSystemService } from './services/file-system-service'
 import { HistoryService } from './services/history-service'
@@ -12,6 +13,7 @@ import { WindowService } from './services/window-service'
 // Create services with automatic type inference
 export const services = createServices([
   AppService,
+  BrowserCookiesService,
   DownloadService,
   FileSystemService,
   HistoryService,

src/main/ipc/services/app-service.ts

@@ -1,6 +1,7 @@
 import os from 'node:os'
 import { app, BrowserWindow, dialog } from 'electron'
 import { type IpcContext, IpcMethod, IpcService } from 'electron-ipc-decorator'
+import { scopedLoggers } from '../../utils/logger'
 
 class AppService extends IpcService {
   static readonly groupName = 'app'
@@ -15,6 +16,37 @@ class AppService extends IpcService {
     return os.platform()
   }
 
+  @IpcMethod()
+  getOsVersion(_context: IpcContext): string {
+    const platform = os.platform()
+    const platformLabel =
+      platform === 'darwin'
+        ? 'macOS'
+        : platform === 'win32'
+          ? 'Windows'
+          : platform === 'linux'
+            ? 'Linux'
+            : platform
+    const systemVersion =
+      typeof (process as { getSystemVersion?: () => string }).getSystemVersion === 'function'
+        ? (process as { getSystemVersion: () => string }).getSystemVersion()
+        : typeof os.version === 'function'
+          ? os.version()
+          : os.release()
+
+    if (platform === 'win32') {
+      const buildToken = systemVersion.split('.').at(-1) ?? ''
+      const buildNumber = Number.parseInt(buildToken, 10)
+      const windowsName =
+        Number.isFinite(buildNumber) && buildNumber >= 22000 ? 'Windows 11' : 'Windows 10'
+      return Number.isFinite(buildNumber)
+        ? `${windowsName} (build ${buildNumber})`
+        : `${platformLabel} ${systemVersion}`.trim()
+    }
+
+    return `${platformLabel} ${systemVersion}`.trim()
+  }
+
   @IpcMethod()
   quit(_context: IpcContext): void {
     app.quit()
@@ -48,7 +80,7 @@ class AppService extends IpcService {
       const base64 = buffer.toString('base64')
       return `data:${contentType};base64,${base64}`
     } catch (error) {
-      console.error('Failed to fetch site icon:', error)
+      scopedLoggers.system.error('Failed to fetch site icon:', error)
       return null
     }
   }

src/main/ipc/services/browser-cookies-service.ts

@@ -0,0 +1,270 @@
+import fs from 'node:fs'
+import os from 'node:os'
+import path from 'node:path'
+import { type IpcContext, IpcMethod, IpcService } from 'electron-ipc-decorator'
+import { resolvePathWithHome } from '../../utils/path-helpers'
+
+class BrowserCookiesService extends IpcService {
+  static readonly groupName = 'browserCookies'
+
+  private buildValidationResult(valid: boolean, reason?: string) {
+    if (valid) {
+      return { valid }
+    }
+    return { valid, reason }
+  }
+
+  private isDirectory(target: string): boolean {
+    try {
+      return fs.statSync(target).isDirectory()
+    } catch {
+      return false
+    }
+  }
+
+  private pickFirstDirectory(paths: string[]): string {
+    for (const candidate of paths) {
+      if (this.isDirectory(candidate)) {
+        return candidate
+      }
+    }
+    return ''
+  }
+
+  private normalizeProfileInput(value: string): string {
+    return value.trim().replace(/^['"]|['"]$/g, '')
+  }
+
+  private getBrowserProfileBaseDirs(platform: string, homeDir: string, browser: string): string[] {
+    if (platform === 'win32') {
+      if (browser === 'edge') {
+        return [path.join(homeDir, 'AppData', 'Local', 'Microsoft', 'Edge', 'User Data')]
+      }
+      if (browser === 'chrome') {
+        return [path.join(homeDir, 'AppData', 'Local', 'Google', 'Chrome', 'User Data')]
+      }
+      if (browser === 'chromium') {
+        return [path.join(homeDir, 'AppData', 'Local', 'Chromium', 'User Data')]
+      }
+      if (browser === 'brave') {
+        return [
+          path.join(homeDir, 'AppData', 'Local', 'BraveSoftware', 'Brave-Browser', 'User Data')
+        ]
+      }
+      if (browser === 'vivaldi') {
+        return [path.join(homeDir, 'AppData', 'Local', 'Vivaldi', 'User Data')]
+      }
+      if (browser === 'whale') {
+        return [path.join(homeDir, 'AppData', 'Local', 'Naver', 'Whale', 'User Data')]
+      }
+      if (browser === 'opera') {
+        return [path.join(homeDir, 'AppData', 'Roaming', 'Opera Software', 'Opera Stable')]
+      }
+      if (browser === 'firefox') {
+        return [path.join(homeDir, 'AppData', 'Roaming', 'Mozilla', 'Firefox', 'Profiles')]
+      }
+    }
+
+    if (platform === 'darwin') {
+      if (browser === 'edge') {
+        return [path.join(homeDir, 'Library', 'Application Support', 'Microsoft Edge')]
+      }
+      if (browser === 'chrome') {
+        return [path.join(homeDir, 'Library', 'Application Support', 'Google', 'Chrome')]
+      }
+      if (browser === 'chromium') {
+        return [path.join(homeDir, 'Library', 'Application Support', 'Chromium')]
+      }
+      if (browser === 'brave') {
+        return [
+          path.join(homeDir, 'Library', 'Application Support', 'BraveSoftware', 'Brave-Browser')
+        ]
+      }
+      if (browser === 'vivaldi') {
+        return [path.join(homeDir, 'Library', 'Application Support', 'Vivaldi')]
+      }
+      if (browser === 'whale') {
+        return [
+          path.join(homeDir, 'Library', 'Application Support', 'Whale'),
+          path.join(homeDir, 'Library', 'Application Support', 'Naver Whale')
+        ]
+      }
+      if (browser === 'opera') {
+        return [
+          path.join(homeDir, 'Library', 'Application Support', 'com.operasoftware.Opera'),
+          path.join(homeDir, 'Library', 'Application Support', 'Opera Software', 'Opera Stable')
+        ]
+      }
+      if (browser === 'firefox') {
+        return [path.join(homeDir, 'Library', 'Application Support', 'Firefox', 'Profiles')]
+      }
+      if (browser === 'safari') {
+        return [path.join(homeDir, 'Library', 'Safari')]
+      }
+    }
+
+    if (platform === 'linux') {
+      if (browser === 'edge') {
+        return [path.join(homeDir, '.config', 'microsoft-edge')]
+      }
+      if (browser === 'chrome') {
+        return [path.join(homeDir, '.config', 'google-chrome')]
+      }
+      if (browser === 'chromium') {
+        return [path.join(homeDir, '.config', 'chromium')]
+      }
+      if (browser === 'brave') {
+        return [path.join(homeDir, '.config', 'BraveSoftware', 'Brave-Browser')]
+      }
+      if (browser === 'vivaldi') {
+        return [path.join(homeDir, '.config', 'vivaldi')]
+      }
+      if (browser === 'whale') {
+        return [path.join(homeDir, '.config', 'naver-whale')]
+      }
+      if (browser === 'opera') {
+        return [path.join(homeDir, '.config', 'opera')]
+      }
+      if (browser === 'firefox') {
+        return [path.join(homeDir, '.mozilla', 'firefox')]
+      }
+    }
+
+    if (platform === 'freebsd') {
+      if (browser === 'firefox') {
+        return [path.join(homeDir, '.mozilla', 'firefox')]
+      }
+    }
+
+    return []
+  }
+
+  private getDefaultProfilePath(baseDirs: string[], browser: string): string {
+    const base = baseDirs[0]
+    if (!base) {
+      return ''
+    }
+
+    if (browser === 'firefox' || browser === 'safari' || browser === 'opera') {
+      return base
+    }
+
+    return path.join(base, 'Default')
+  }
+
+  private findFirefoxProfilePath(profilesDir: string): string {
+    if (!this.isDirectory(profilesDir)) {
+      return ''
+    }
+
+    const entries = fs
+      .readdirSync(profilesDir, { withFileTypes: true })
+      .filter((entry) => entry.isDirectory())
+      .map((entry) => entry.name)
+      .sort((a, b) => a.localeCompare(b))
+
+    const preferred =
+      entries.find((name) => name.endsWith('.default-release')) ??
+      entries.find((name) => name.endsWith('.default')) ??
+      entries[0]
+
+    return preferred ? path.join(profilesDir, preferred) : ''
+  }
+
+  @IpcMethod()
+  getBrowserProfilePath(_context: IpcContext, browser: string): string {
+    if (!browser || browser === 'none') {
+      return ''
+    }
+
+    const homeDir = os.homedir()
+    const platform = os.platform()
+    const baseDirs = this.getBrowserProfileBaseDirs(platform, homeDir, browser)
+    const fallbackPath = this.getDefaultProfilePath(baseDirs, browser)
+
+    if (browser === 'firefox') {
+      const profilesDir = baseDirs[0]
+      const profilePath = profilesDir ? this.findFirefoxProfilePath(profilesDir) : ''
+      return profilePath || fallbackPath
+    }
+
+    if (browser === 'safari') {
+      const safariPath = baseDirs[0]
+      if (safariPath && this.isDirectory(safariPath)) {
+        return safariPath
+      }
+      return fallbackPath
+    }
+
+    if (baseDirs.length === 0) {
+      return fallbackPath
+    }
+
+    let detectedPath = ''
+    for (const baseDir of baseDirs) {
+      if (!baseDir) {
+        continue
+      }
+      const candidates =
+        browser === 'opera'
+          ? [baseDir, path.join(baseDir, 'Default'), path.join(baseDir, 'Profile 1')]
+          : [path.join(baseDir, 'Default'), path.join(baseDir, 'Profile 1')]
+      detectedPath = this.pickFirstDirectory(candidates)
+      if (detectedPath) {
+        break
+      }
+    }
+
+    return detectedPath || fallbackPath
+  }
+
+  @IpcMethod()
+  validateBrowserProfilePath(
+    _context: IpcContext,
+    browser: string,
+    profilePath: string
+  ): { valid: boolean; reason?: string } {
+    if (!browser || browser === 'none') {
+      return this.buildValidationResult(false, 'browserUnsupported')
+    }
+
+    const normalizedInput = this.normalizeProfileInput(profilePath)
+    if (!normalizedInput) {
+      return this.buildValidationResult(false, 'empty')
+    }
+
+    const resolvedInput = resolvePathWithHome(normalizedInput)
+    if (resolvedInput && this.isDirectory(resolvedInput)) {
+      return this.buildValidationResult(true)
+    }
+
+    const looksLikePath =
+      resolvedInput &&
+      (path.isAbsolute(resolvedInput) ||
+        resolvedInput.includes('/') ||
+        resolvedInput.includes('\\'))
+    if (looksLikePath) {
+      return this.buildValidationResult(false, 'pathNotFound')
+    }
+
+    const platform = os.platform()
+    const homeDir = os.homedir()
+    const baseDirs = this.getBrowserProfileBaseDirs(platform, homeDir, browser)
+    if (baseDirs.length === 0) {
+      return this.buildValidationResult(false, 'browserUnsupported')
+    }
+    for (const baseDir of baseDirs) {
+      if (!baseDir) {
+        continue
+      }
+      const candidate = path.join(baseDir, normalizedInput)
+      if (this.isDirectory(candidate)) {
+        return this.buildValidationResult(true)
+      }
+    }
+
+    return this.buildValidationResult(false, 'profileNotFound')
+  }
+}
+
+export { BrowserCookiesService }

src/main/ipc/services/download-service.ts

@@ -5,7 +5,8 @@ import type {
   PlaylistDownloadOptions,
   PlaylistDownloadResult,
   PlaylistInfo,
-  VideoInfo
+  VideoInfo,
+  VideoInfoCommandResult
 } from '../../../shared/types'
 import { downloadEngine } from '../../lib/download-engine'
 
@@ -17,6 +18,14 @@ class DownloadService extends IpcService {
     return downloadEngine.getVideoInfo(url)
   }
 
+  @IpcMethod()
+  async getVideoInfoWithCommand(
+    _context: IpcContext,
+    url: string
+  ): Promise<VideoInfoCommandResult> {
+    return downloadEngine.getVideoInfoWithCommand(url)
+  }
+
   @IpcMethod()
   async getPlaylistInfo(_context: IpcContext, url: string): Promise<PlaylistInfo> {
     return downloadEngine.getPlaylistInfo(url)
@@ -37,6 +46,11 @@ class DownloadService extends IpcService {
     return downloadEngine.getQueueStatus()
   }
 
+  @IpcMethod()
+  getActiveDownloads(_context: IpcContext): DownloadItem[] {
+    return downloadEngine.getActiveDownloads()
+  }
+
   @IpcMethod()
   updateDownloadInfo(_context: IpcContext, id: string, updates: Partial<DownloadItem>): void {
     downloadEngine.updateDownloadInfo(id, updates)

src/main/ipc/services/file-system-service.ts

@@ -6,6 +6,7 @@ import { pathToFileURL } from 'node:url'
 import { promisify } from 'node:util'
 import { clipboard, dialog, shell } from 'electron'
 import { type IpcContext, IpcMethod, IpcService } from 'electron-ipc-decorator'
+import { scopedLoggers } from '../../utils/logger'
 
 const execFileAsync = promisify(execFile)
 
@@ -49,7 +50,10 @@ class FileSystemService extends IpcService {
           return xdgPath
         }
       } catch (error) {
-        console.warn('Unable to resolve XDG download directory, falling back to default:', error)
+        scopedLoggers.system.warn(
+          'Unable to resolve XDG download directory, falling back to default:',
+          error
+        )
       }
     }
 
@@ -75,7 +79,7 @@ class FileSystemService extends IpcService {
       if (stats?.isDirectory()) {
         const result = await shell.openPath(normalizedPath)
         if (result) {
-          console.error('Failed to open directory:', result)
+          scopedLoggers.system.error('Failed to open directory:', result)
           return false
         }
         return true
@@ -88,16 +92,16 @@ class FileSystemService extends IpcService {
       if (parentStats?.isDirectory()) {
         const result = await shell.openPath(parentDirectory)
         if (result) {
-          console.error('Failed to open parent directory:', result)
+          scopedLoggers.system.error('Failed to open parent directory:', result)
           return false
         }
         return true
       }
 
-      console.error('File or directory does not exist:', normalizedPath)
+      scopedLoggers.system.error('File or directory does not exist:', normalizedPath)
       return false
     } catch (error) {
-      console.error('Failed to open file location:', error)
+      scopedLoggers.system.error('Failed to open file location:', error)
       return false
     }
   }
@@ -122,7 +126,7 @@ class FileSystemService extends IpcService {
 
       return true
     } catch (error) {
-      console.error('Failed to copy file to clipboard:', error)
+      scopedLoggers.system.error('Failed to copy file to clipboard:', error)
       return false
     }
   }
@@ -150,7 +154,7 @@ class FileSystemService extends IpcService {
       await shell.openExternal(url)
       return true
     } catch (error) {
-      console.error('Failed to open external URL:', error)
+      scopedLoggers.system.error('Failed to open external URL:', error)
       return false
     }
   }
@@ -166,7 +170,10 @@ class FileSystemService extends IpcService {
       ])
       return
     } catch (error) {
-      console.error('PowerShell clipboard copy failed, falling back to manual buffer:', error)
+      scopedLoggers.system.error(
+        'PowerShell clipboard copy failed, falling back to manual buffer:',
+        error
+      )
     }
 
     const winPath = resolvedPath.replace(/\//g, '\\')
@@ -194,7 +201,10 @@ class FileSystemService extends IpcService {
       await execFileAsync('osascript', ['-e', `set the clipboard to (POSIX file "${escaped}")`])
       return
     } catch (error) {
-      console.error('osascript clipboard copy failed, falling back to manual buffer:', error)
+      scopedLoggers.system.error(
+        'osascript clipboard copy failed, falling back to manual buffer:',
+        error
+      )
     }
 
     const entries = [
@@ -243,7 +253,7 @@ class FileSystemService extends IpcService {
 
       return stats?.isFile() ?? false
     } catch (error) {
-      console.error('Failed to check file existence:', error)
+      scopedLoggers.system.error('Failed to check file existence:', error)
       return false
     }
   }
@@ -295,7 +305,7 @@ class FileSystemService extends IpcService {
 
       return false
     } catch (error) {
-      console.error('Failed to delete file:', error)
+      scopedLoggers.system.error('Failed to delete file:', error)
       return false
     }
   }

src/main/ipc/services/history-service.ts

@@ -25,6 +25,21 @@ class HistoryService extends IpcService {
     return historyManager.removeHistoryItem(id)
   }
 
+  @IpcMethod()
+  removeHistoryItems(_context: IpcContext, ids: string[]): number {
+    return historyManager.removeHistoryItems(ids)
+  }
+
+  @IpcMethod()
+  removeHistoryByPlaylistId(_context: IpcContext, playlistId: string): number {
+    return historyManager.removeHistoryByPlaylistId(playlistId)
+  }
+
+  @IpcMethod()
+  clearHistory(_context: IpcContext): void {
+    historyManager.clearHistory()
+  }
+
   @IpcMethod()
   getHistoryCount(_context: IpcContext): {
     active: number

src/main/ipc/services/settings-service.ts

@@ -1,7 +1,5 @@
 import { type IpcContext, IpcMethod, IpcService } from 'electron-ipc-decorator'
 import type { AppSettings } from '../../../shared/types'
-import { sanitizeFilenameTemplate } from '../../download-engine/args-builder'
-import { subscriptionScheduler } from '../../lib/subscription-scheduler'
 import { settingsManager } from '../../settings'
 import { updateTrayMenu } from '../../tray'
 import { applyAutoLaunchSetting } from '../../utils/auto-launch'
@@ -12,20 +10,12 @@ class SettingsService extends IpcService {
 
   @IpcMethod()
   get<K extends keyof AppSettings>(_context: IpcContext, key: K): AppSettings[K] {
-    const value = settingsManager.get(key)
-    if (key === 'subscriptionFilenameTemplate' && typeof value === 'string') {
-      return sanitizeFilenameTemplate(value) as AppSettings[K]
-    }
-    return value
+    return settingsManager.get(key)
   }
 
   @IpcMethod()
   set<K extends keyof AppSettings>(_context: IpcContext, key: K, value: AppSettings[K]): void {
-    if (key === 'subscriptionFilenameTemplate' && typeof value === 'string') {
-      settingsManager.set(key, sanitizeFilenameTemplate(value) as AppSettings[K])
-    } else {
-      settingsManager.set(key, value)
-    }
+    settingsManager.set(key, value)
 
     if (key === 'language') {
       updateTrayMenu()
@@ -38,30 +28,15 @@ class SettingsService extends IpcService {
     if (key === 'launchAtLogin') {
       applyAutoLaunchSetting(value as AppSettings['launchAtLogin'])
     }
-
-    if (key === 'subscriptionCheckIntervalHours') {
-      subscriptionScheduler.refreshInterval()
-    }
   }
 
   @IpcMethod()
   getAll(_context: IpcContext): AppSettings {
-    const settings = settingsManager.getAll()
-    if (typeof settings.subscriptionFilenameTemplate === 'string') {
-      settings.subscriptionFilenameTemplate = sanitizeFilenameTemplate(
-        settings.subscriptionFilenameTemplate
-      )
-    }
-    return settings
+    return settingsManager.getAll()
   }
 
   @IpcMethod()
   setAll(_context: IpcContext, settings: Partial<AppSettings>): void {
-    if (typeof settings.subscriptionFilenameTemplate === 'string') {
-      settings.subscriptionFilenameTemplate = sanitizeFilenameTemplate(
-        settings.subscriptionFilenameTemplate
-      )
-    }
     settingsManager.setAll(settings)
 
     if (settings.language) {
@@ -75,10 +50,6 @@ class SettingsService extends IpcService {
     if (typeof settings.launchAtLogin === 'boolean') {
       applyAutoLaunchSetting(settings.launchAtLogin)
     }
-
-    if (settings.subscriptionCheckIntervalHours !== undefined) {
-      subscriptionScheduler.refreshInterval()
-    }
   }
 
   @IpcMethod()
@@ -86,7 +57,6 @@ class SettingsService extends IpcService {
     settingsManager.reset()
     applyDockVisibility(settingsManager.get('hideDockIcon'))
     applyAutoLaunchSetting(settingsManager.get('launchAtLogin'))
-    subscriptionScheduler.refreshInterval()
   }
 }
 

src/main/ipc/services/subscription-service.ts

@@ -1,3 +1,4 @@
+import path from 'node:path'
 import { type IpcContext, IpcMethod, IpcService } from 'electron-ipc-decorator'
 import type {
   SubscriptionCreatePayload,
@@ -5,6 +6,10 @@ import type {
   SubscriptionRule,
   SubscriptionUpdatePayload
 } from '../../../shared/types'
+import {
+  DEFAULT_SUBSCRIPTION_FILENAME_TEMPLATE,
+  SUBSCRIPTION_DUPLICATE_FEED_ERROR
+} from '../../../shared/types'
 import { sanitizeFilenameTemplate } from '../../download-engine/args-builder'
 import { subscriptionManager } from '../../lib/subscription-manager'
 import { subscriptionScheduler } from '../../lib/subscription-scheduler'
@@ -111,7 +116,12 @@ class SubscriptionService extends IpcService {
     options: CreateSubscriptionOptions
   ): Promise<SubscriptionRule> {
     const resolved = resolveFeedFromInput(options.url)
+    const duplicate = subscriptionManager.findDuplicateFeed(resolved.feedUrl)
+    if (duplicate) {
+      throw new Error(SUBSCRIPTION_DUPLICATE_FEED_ERROR)
+    }
     const settings = settingsManager.getAll()
+    const defaultDownloadDirectory = path.join(settings.downloadPath, 'Subscriptions')
     const payload: SubscriptionCreatePayload = {
       sourceUrl: resolved.sourceUrl,
       feedUrl: resolved.feedUrl,
@@ -120,9 +130,9 @@ class SubscriptionService extends IpcService {
       tags: options.tags,
       onlyDownloadLatest:
         options.onlyDownloadLatest ?? settings.subscriptionOnlyLatestDefault ?? true,
-      downloadDirectory: options.downloadDirectory || settings.downloadPath,
+      downloadDirectory: options.downloadDirectory || defaultDownloadDirectory,
       namingTemplate: sanitizeFilenameTemplate(
-        options.namingTemplate || settings.subscriptionFilenameTemplate
+        options.namingTemplate || DEFAULT_SUBSCRIPTION_FILENAME_TEMPLATE
       ),
       enabled: options.enabled ?? true
     }
@@ -138,6 +148,12 @@ class SubscriptionService extends IpcService {
     id: string,
     updates: SubscriptionUpdatePayload
   ): SubscriptionRule | undefined {
+    if (updates.feedUrl) {
+      const duplicate = subscriptionManager.findDuplicateFeed(updates.feedUrl, id)
+      if (duplicate) {
+        throw new Error(SUBSCRIPTION_DUPLICATE_FEED_ERROR)
+      }
+    }
     const normalized: SubscriptionUpdatePayload = { ...updates }
     if (typeof normalized.namingTemplate === 'string') {
       normalized.namingTemplate = sanitizeFilenameTemplate(normalized.namingTemplate)

src/main/lib/database/schema.ts

@@ -15,6 +15,7 @@ export const downloadHistoryTable = sqliteTable('download_history', {
   completedAt: integer('completed_at', { mode: 'number' }),
   sortKey: integer('sort_key', { mode: 'number' }).notNull(),
   error: text('error'),
+  ytDlpCommand: text('yt_dlp_command'),
   description: text('description'),
   channel: text('channel'),
   uploader: text('uploader'),

src/main/lib/download-engine.ts

@@ -1,4 +1,5 @@
 import { EventEmitter } from 'node:events'
+import fs from 'node:fs'
 import path from 'node:path'
 import type { YTDlpEventEmitter } from 'yt-dlp-wrap-plus'
 import type {
@@ -10,9 +11,14 @@ import type {
   PlaylistDownloadResult,
   PlaylistInfo,
   VideoFormat,
-  VideoInfo
+  VideoInfo,
+  VideoInfoCommandResult
 } from '../../shared/types'
-import { buildDownloadArgs, resolveVideoFormatSelector } from '../download-engine/args-builder'
+import {
+  buildDownloadArgs,
+  resolveVideoFormatSelector,
+  sanitizeFilenameTemplate
+} from '../download-engine/args-builder'
 import {
   findFormatByIdCandidates,
   parseSizeToBytes,
@@ -20,7 +26,13 @@ import {
 } from '../download-engine/format-utils'
 import { settingsManager } from '../settings'
 import { scopedLoggers } from '../utils/logger'
+import { resolvePathWithHome } from '../utils/path-helpers'
 import { DownloadQueue } from './download-queue'
+import {
+  type DownloadSessionItem,
+  loadDownloadSession,
+  saveDownloadSession
+} from './download-session-store'
 import { ffmpegManager } from './ffmpeg-manager'
 import { historyManager } from './history-manager'
 import { ytdlpManager } from './ytdlp-manager'
@@ -30,9 +42,233 @@ interface DownloadProcess {
   process: YTDlpEventEmitter
 }
 
+const formatYtDlpCommand = (args: string[]): string => {
+  const quoted = args.map((arg) => {
+    if (arg === '') {
+      return '""'
+    }
+    if (/[\s"'\\]/.test(arg)) {
+      return `"${arg.replace(/(["\\])/g, '\\$1')}"`
+    }
+    return arg
+  })
+  return `yt-dlp ${quoted.join(' ')}`
+}
+
+const resolveFfmpegLocation = (ffmpegPath: string): string => path.dirname(ffmpegPath)
+
+const ensureDirectoryExists = (dir?: string): void => {
+  if (!dir) {
+    return
+  }
+  try {
+    fs.mkdirSync(dir, { recursive: true })
+  } catch (error) {
+    scopedLoggers.download.error('Failed to ensure download directory:', error)
+  }
+}
+
+const sanitizeFolderName = (value: string, fallback: string): string => {
+  const trimmed = value.trim()
+  if (!trimmed) {
+    return fallback
+  }
+  const sanitized = trimmed
+    .replace(/[\\/:*?"<>|]+/g, '-')
+    .replace(/\s+/g, ' ')
+    .replace(/[. ]+$/g, '')
+  return sanitized || fallback
+}
+
+const isLikelyChannelUrl = (url: string): boolean => {
+  const normalized = url.toLowerCase()
+  if (normalized.includes('list=')) {
+    return false
+  }
+  return /youtube\.com\/(channel\/|c\/|user\/|@)/.test(normalized)
+}
+
+const clampPercent = (value?: number): number => {
+  const normalized = typeof value === 'number' ? value : 0
+  if (Number.isNaN(normalized)) {
+    return 0
+  }
+  return Math.min(100, Math.max(0, normalized))
+}
+
+const estimateProgressParts = (options: DownloadOptions): number => {
+  if (options.type === 'audio') {
+    return 1
+  }
+
+  const audioFormatCount = options.audioFormatIds?.filter((id) => id.trim() !== '').length ?? 0
+  if (audioFormatCount > 0) {
+    return 1 + audioFormatCount
+  }
+
+  const selector = options.format?.trim()
+  if (!selector) {
+    return 2
+  }
+
+  const primary = selector.split('/')[0]?.trim()
+  if (!primary) {
+    return 2
+  }
+
+  const parts = primary
+    .split('+')
+    .map((part) => part.trim())
+    .filter((part) => part !== '')
+
+  if (parts.length <= 1) {
+    return 1
+  }
+
+  if (parts.some((part) => part === 'none')) {
+    return 1
+  }
+
+  return parts.length
+}
+
+const isMuxedFormat = (format?: VideoFormat): boolean => {
+  if (!format) {
+    return false
+  }
+  const hasVideo = !!format.vcodec && format.vcodec !== 'none'
+  const hasAudio = !!format.acodec && format.acodec !== 'none'
+  return hasVideo && hasAudio
+}
+
+const resolveAutoPlaylistDownloadPath = (
+  basePath: string,
+  info: PlaylistInfo,
+  url: string
+): string => {
+  const kindFolder = isLikelyChannelUrl(url) ? 'Channels' : 'Playlists'
+  const title = sanitizeFolderName(
+    info.title || (kindFolder === 'Channels' ? 'Channel' : 'Playlist'),
+    kindFolder === 'Channels' ? 'Channel' : 'Playlist'
+  )
+  return path.join(basePath, kindFolder, title)
+}
+
+const resolveAutoVideoDownloadPath = (basePath: string, info?: VideoInfo): string => {
+  const root = path.join(basePath, 'Videos')
+  if (!info) {
+    return root
+  }
+  const label = info.uploader?.trim() || info.title?.trim()
+  if (!label) {
+    return root
+  }
+  return path.join(root, sanitizeFolderName(label, 'Video'))
+}
+
+const sanitizeTemplateValue = (value: string): string =>
+  value
+    .replace(/[\\/:*?"<>|]+/g, '-')
+    .replace(/\s+/g, ' ')
+    .trim()
+    .replace(/[. ]+$/g, '')
+
+const resolveTemplateToken = (token: string, info?: VideoInfo): string | undefined => {
+  if (!info) {
+    return undefined
+  }
+  switch (token) {
+    case 'uploader':
+      return info.uploader
+    case 'title':
+      return info.title
+    case 'id':
+      return info.id
+    case 'channel':
+      return info.uploader
+    case 'extractor':
+      return info.extractor_key
+    default:
+      return undefined
+  }
+}
+
+const resolveHistoryDownloadPath = (
+  basePath: string,
+  filenameTemplate?: string,
+  info?: VideoInfo
+): string => {
+  if (!filenameTemplate?.trim()) {
+    return basePath
+  }
+  const safeTemplate = sanitizeFilenameTemplate(filenameTemplate)
+  const resolvedTemplate = safeTemplate.replace(/%\(([^)]+)\)s/g, (match, token) => {
+    const value = resolveTemplateToken(token, info)
+    if (!value) {
+      return match
+    }
+    return sanitizeTemplateValue(value)
+  })
+  const templateDir = path.posix.dirname(resolvedTemplate)
+  if (templateDir === '.' || templateDir === '/') {
+    return basePath
+  }
+  if (/%\([^)]+\)s/.test(templateDir)) {
+    return basePath
+  }
+  return path.join(basePath, templateDir)
+}
+
+const appendJsRuntimeArgs = (args: string[]): void => {
+  const runtimeArgs = ytdlpManager.getJsRuntimeArgs()
+  if (runtimeArgs.length > 0) {
+    args.push(...runtimeArgs)
+  }
+}
+
+const buildVideoInfoArgs = (url: string, settings: ReturnType<typeof settingsManager.getAll>) => {
+  const args = ['-j', '--no-playlist', '--no-warnings']
+
+  // Add encoding support for proper handling of non-ASCII characters
+  args.push('--encoding', 'utf-8')
+
+  // Note: Some sites (e.g., YouTube) may not provide filesize information
+  // in the initial request. This is normal behavior and filesize may be null/undefined
+  // for many formats. File size information might require additional HTTP HEAD requests
+  // which would significantly slow down info extraction, so yt-dlp doesn't fetch it by default.
+
+  // Add proxy if configured
+  if (settings.proxy) {
+    args.push('--proxy', settings.proxy)
+  }
+
+  // Add browser cookies if configured (skip if 'none')
+  if (settings.browserForCookies && settings.browserForCookies !== 'none') {
+    args.push('--cookies-from-browser', settings.browserForCookies)
+  }
+
+  const cookiesPath = settings.cookiesPath?.trim()
+  if (cookiesPath) {
+    args.push('--cookies', cookiesPath)
+  }
+
+  // Add config file if configured
+  const configPath = resolvePathWithHome(settings.configPath)
+  if (configPath) {
+    args.push('--config-location', configPath)
+  }
+
+  appendJsRuntimeArgs(args)
+  args.push(url)
+
+  return args
+}
+
 class DownloadEngine extends EventEmitter {
   private activeDownloads: Map<string, DownloadProcess> = new Map()
   private queue: DownloadQueue
+  private sessionPersistTimer: NodeJS.Timeout | null = null
+  private sessionRestored = false
 
   constructor() {
     super()
@@ -42,43 +278,17 @@ class DownloadEngine extends EventEmitter {
     this.queue.on('start-download', async (item) => {
       await this.executeDownload(item.id, item.options)
     })
+
+    this.queue.on('queue-updated', () => {
+      this.scheduleSessionPersist()
+    })
   }
 
   async getVideoInfo(url: string): Promise<VideoInfo> {
     const ytdlp = ytdlpManager.getInstance()
     const settings = settingsManager.getAll()
 
-    const args = ['-j', '--no-playlist', '--no-warnings']
-
-    // Add encoding support for proper handling of non-ASCII characters
-    args.push('--encoding', 'utf-8')
-
-    // Note: Some sites (e.g., YouTube) may not provide filesize information
-    // in the initial request. This is normal behavior and filesize may be null/undefined
-    // for many formats. File size information might require additional HTTP HEAD requests
-    // which would significantly slow down info extraction, so yt-dlp doesn't fetch it by default.
-
-    // Add proxy if configured
-    if (settings.proxy) {
-      args.push('--proxy', settings.proxy)
-    }
-
-    // Add browser cookies if configured (skip if 'none')
-    if (settings.browserForCookies && settings.browserForCookies !== 'none') {
-      args.push('--cookies-from-browser', settings.browserForCookies)
-    }
-
-    const cookiesPath = settings.cookiesPath?.trim()
-    if (cookiesPath) {
-      args.push('--cookies', cookiesPath)
-    }
-
-    // Add config file if configured
-    if (settings.configPath) {
-      args.push('--config-location', `"${settings.configPath}"`)
-    }
-
-    args.push(url)
+    const args = buildVideoInfoArgs(url, settings)
 
     return new Promise((resolve, reject) => {
       const process = ytdlp.exec(args)
@@ -144,6 +354,90 @@ class DownloadEngine extends EventEmitter {
     })
   }
 
+  async getVideoInfoWithCommand(url: string): Promise<VideoInfoCommandResult> {
+    const ytdlp = ytdlpManager.getInstance()
+    const settings = settingsManager.getAll()
+    const args = buildVideoInfoArgs(url, settings)
+    const ytDlpCommand = formatYtDlpCommand(args)
+
+    return new Promise((resolve) => {
+      let settled = false
+      const resolveOnce = (payload: VideoInfoCommandResult) => {
+        if (settled) {
+          return
+        }
+        settled = true
+        resolve(payload)
+      }
+
+      const process = ytdlp.exec(args)
+      let stdout = ''
+      let stderr = ''
+
+      process.ytDlpProcess?.stdout?.on('data', (data: Buffer) => {
+        stdout += data.toString()
+      })
+
+      process.ytDlpProcess?.stderr?.on('data', (data: Buffer) => {
+        stderr += data.toString()
+      })
+
+      process.on('close', (code) => {
+        if (code === 0 && stdout) {
+          try {
+            const info = JSON.parse(stdout)
+
+            // Calculate estimated file size for formats missing filesize information
+            // Using tbr (total bitrate in kbps) and duration (in seconds)
+            // Formula: (tbr * 1000) / 8 * duration = size in bytes
+            if (info.formats && Array.isArray(info.formats) && info.duration) {
+              const duration = info.duration
+              for (const format of info.formats) {
+                if (
+                  !format.filesize &&
+                  !format.filesize_approx &&
+                  format.tbr &&
+                  typeof format.tbr === 'number' &&
+                  duration > 0
+                ) {
+                  const estimatedSize = Math.round(((format.tbr * 1000) / 8) * duration)
+                  format.filesize_approx = estimatedSize
+                }
+              }
+            }
+
+            scopedLoggers.download.info('Successfully retrieved video info for:', url)
+            resolveOnce({ info, ytDlpCommand })
+          } catch (error) {
+            scopedLoggers.download.error('Failed to parse video info for:', url, error)
+            resolveOnce({
+              ytDlpCommand,
+              error: `Failed to parse video info: ${error instanceof Error ? error.message : error}`
+            })
+          }
+        } else {
+          scopedLoggers.download.error(
+            'Failed to fetch video info for:',
+            url,
+            'Exit code:',
+            code,
+            'Error:',
+            stderr
+          )
+          resolveOnce({ ytDlpCommand, error: stderr || 'Failed to fetch video info' })
+        }
+      })
+
+      process.on('error', (error) => {
+        scopedLoggers.download.error('yt-dlp process error for:', url, error)
+        resolveOnce({
+          ytDlpCommand,
+          error: error instanceof Error ? error.message : 'Failed to fetch video info'
+        })
+      })
+    })
+  }
+
   async getPlaylistInfo(url: string): Promise<PlaylistInfo> {
     const ytdlp = ytdlpManager.getInstance()
     const settings = settingsManager.getAll()
@@ -169,10 +463,12 @@ class DownloadEngine extends EventEmitter {
     }
 
     // Add config file if configured
-    if (settings.configPath) {
-      args.push('--config-location', `"${settings.configPath}"`)
+    const configPath = resolvePathWithHome(settings.configPath)
+    if (configPath) {
+      args.push('--config-location', configPath)
     }
 
+    appendJsRuntimeArgs(args)
     args.push(url)
 
     type RawPlaylistEntry = {
@@ -313,6 +609,10 @@ class DownloadEngine extends EventEmitter {
     const rangeEnd = Math.max(requestedStart, requestedEnd)
     const rawEntries = playlistInfo.entries.slice(rangeStart, rangeEnd + 1)
     const settings = settingsManager.getAll()
+    const resolvedDownloadPath =
+      options.customDownloadPath?.trim() ||
+      resolveAutoPlaylistDownloadPath(settings.downloadPath, playlistInfo, options.url)
+    ensureDirectoryExists(resolvedDownloadPath)
 
     const selectedEntries = rawEntries.filter((entry) => {
       if (!entry.url) {
@@ -336,7 +636,8 @@ class DownloadEngine extends EventEmitter {
         url: entry.url,
         type: options.type,
         format: options.format,
-        audioFormat: options.type === 'audio' ? options.format : undefined
+        audioFormat: options.type === 'audio' ? options.format : undefined,
+        customDownloadPath: resolvedDownloadPath
       }
 
       const createdAt = Date.now()
@@ -367,7 +668,7 @@ class DownloadEngine extends EventEmitter {
         title: entry.title,
         status: 'pending',
         downloadedAt: createdAt,
-        downloadPath: settings.downloadPath,
+        downloadPath: resolvedDownloadPath,
         playlistId: groupId,
         playlistTitle: playlistInfo.title,
         playlistIndex: entry.index,
@@ -389,7 +690,7 @@ class DownloadEngine extends EventEmitter {
 
   startDownload(id: string, options: DownloadOptions): void {
     if (this.activeDownloads.has(id)) {
-      console.warn(`Download ${id} is already active`)
+      scopedLoggers.engine.warn(`Download ${id} is already active`)
       return
     }
 
@@ -397,6 +698,12 @@ class DownloadEngine extends EventEmitter {
     const settings = settingsManager.getAll()
     const targetDownloadPath = options.customDownloadPath?.trim() || settings.downloadPath
     const origin = options.origin ?? 'manual'
+    const historyDownloadPath = resolveHistoryDownloadPath(
+      targetDownloadPath,
+      options.customFilenameTemplate
+    )
+    ensureDirectoryExists(targetDownloadPath)
+    ensureDirectoryExists(historyDownloadPath)
 
     const item: DownloadItem = {
       id,
@@ -416,7 +723,7 @@ class DownloadEngine extends EventEmitter {
       title: item.title,
       status: 'pending',
       downloadedAt: createdAt,
-      downloadPath: targetDownloadPath,
+      downloadPath: historyDownloadPath,
       tags: options.tags,
       origin,
       subscriptionId: options.subscriptionId
@@ -428,7 +735,7 @@ class DownloadEngine extends EventEmitter {
     const ytdlp = ytdlpManager.getInstance()
     const settings = settingsManager.getAll()
     const defaultDownloadPath = settings.downloadPath
-    const resolvedDownloadPath = options.customDownloadPath?.trim() || defaultDownloadPath
+    let resolvedDownloadPath = options.customDownloadPath?.trim() || defaultDownloadPath
 
     // Set environment variables for proper encoding on Windows
     if (process.platform === 'win32') {
@@ -441,6 +748,9 @@ class DownloadEngine extends EventEmitter {
     let actualFormat: string | null = null
     let videoInfo: VideoInfo | undefined
     let lastKnownOutputPath: string | undefined
+    let totalParts = estimateProgressParts(options)
+    let completedParts = 0
+    let lastPercent = 0
 
     // First, get detailed video info to capture basic metadata and formats
     try {
@@ -454,6 +764,14 @@ class DownloadEngine extends EventEmitter {
         actualFormat = selectedFormat.ext || actualFormat
       }
 
+      if (
+        options.type === 'video' &&
+        (!options.audioFormatIds || options.audioFormatIds.length === 0) &&
+        isMuxedFormat(selectedFormat)
+      ) {
+        totalParts = 1
+      }
+
       this.updateDownloadInfo(id, {
         title: info.title,
         thumbnail: info.thumbnail,
@@ -479,6 +797,19 @@ class DownloadEngine extends EventEmitter {
       scopedLoggers.download.warn('Failed to get detailed video info for ID:', id, error)
     }
 
+    if (!options.customDownloadPath?.trim()) {
+      resolvedDownloadPath = resolveAutoVideoDownloadPath(defaultDownloadPath, videoInfo)
+      options.customDownloadPath = resolvedDownloadPath
+    }
+
+    const historyDownloadPath = resolveHistoryDownloadPath(
+      resolvedDownloadPath,
+      options.customFilenameTemplate,
+      videoInfo
+    )
+    ensureDirectoryExists(historyDownloadPath)
+    this.upsertHistoryEntry(id, options, { downloadPath: historyDownloadPath })
+
     const applySelectedFormat = (formatId: string | undefined): boolean => {
       if (!formatId) {
         return false
@@ -503,7 +834,12 @@ class DownloadEngine extends EventEmitter {
       return true
     }
 
-    const args = buildDownloadArgs(options, resolvedDownloadPath, settings)
+    const args = buildDownloadArgs(
+      options,
+      resolvedDownloadPath,
+      settings,
+      ytdlpManager.getJsRuntimeArgs()
+    )
 
     const captureOutputPath = (rawPath: string | undefined): void => {
       if (!rawPath) {
@@ -574,9 +910,14 @@ class DownloadEngine extends EventEmitter {
       return
     }
 
-    args.push('--ffmpeg-location', ffmpegPath)
+    const ffmpegLocation = resolveFfmpegLocation(ffmpegPath)
+    args.push('--ffmpeg-location', ffmpegLocation)
     args.push(urlArg)
 
+    const ytDlpCommand = formatYtDlpCommand(args)
+    this.updateDownloadInfo(id, { ytDlpCommand })
+    scopedLoggers.download.info('yt-dlp command:', ytDlpCommand)
+
     const controller = new AbortController()
     const ytdlpProcess = ytdlp.exec(args, {
       signal: controller.signal
@@ -584,6 +925,8 @@ class DownloadEngine extends EventEmitter {
 
     this.activeDownloads.set(id, { controller, process: ytdlpProcess })
 
+    this.queue.updateItemInfo(id, { status: 'downloading', startedAt: Date.now() })
+    this.scheduleSessionPersist()
     this.emit('download-started', id)
 
     this.upsertHistoryEntry(id, options, {
@@ -615,13 +958,33 @@ class DownloadEngine extends EventEmitter {
               : downloadedBytes
         }
 
+        const normalizedPercent = clampPercent(progress.percent)
+        if (
+          totalParts > 1 &&
+          lastPercent >= 90 &&
+          normalizedPercent <= 10 &&
+          completedParts < totalParts - 1
+        ) {
+          completedParts += 1
+        }
+        lastPercent = normalizedPercent
+        const mergedPercent =
+          totalParts > 1
+            ? ((completedParts + normalizedPercent / 100) / totalParts) * 100
+            : normalizedPercent
+
         const downloadProgress: DownloadProgress = {
-          percent: progress.percent || 0,
+          percent: Math.min(100, mergedPercent),
           currentSpeed: progress.currentSpeed || '',
           eta: progress.eta || '',
           downloaded: progress.downloaded || '',
           total: progress.total || ''
         }
+        this.queue.updateItemInfo(id, {
+          progress: downloadProgress,
+          speed: downloadProgress.currentSpeed || ''
+        })
+        this.scheduleSessionPersist()
         this.emit('download-progress', id, downloadProgress)
       }
     )
@@ -674,7 +1037,8 @@ class DownloadEngine extends EventEmitter {
         // based on codec compatibility, so we should use actualFormat when available
         let extension: string
         if (options.type === 'audio') {
-          extension = options.extractFormat || 'mp3'
+          // Use format extension from yt-dlp output (actualFormat contains the extension)
+          extension = actualFormat || 'm4a'
         } else if (willMerge) {
           // For merged files, yt-dlp auto-selects format (mkv/webm/mp4)
           // Use actualFormat if available, otherwise default to mkv (most compatible)
@@ -835,6 +1199,72 @@ class DownloadEngine extends EventEmitter {
     return this.queue.getQueueStatus()
   }
 
+  getActiveDownloads(): DownloadItem[] {
+    const items = new Map<string, DownloadItem>()
+    for (const item of this.queue.getActiveItems()) {
+      items.set(item.id, item)
+    }
+    for (const item of this.queue.getQueuedItems()) {
+      items.set(item.id, item)
+    }
+    return Array.from(items.values()).sort((a, b) => b.createdAt - a.createdAt)
+  }
+
+  restoreActiveDownloads(): void {
+    if (this.sessionRestored) {
+      return
+    }
+    this.sessionRestored = true
+
+    const sessionItems = loadDownloadSession()
+    if (sessionItems.length === 0) {
+      return
+    }
+
+    for (const entry of sessionItems) {
+      if (!entry?.id || !entry.options?.url || !entry.options.type) {
+        continue
+      }
+      if (this.queue.getItemDetails(entry.id)) {
+        continue
+      }
+
+      const historyItem = historyManager.getHistoryById(entry.id)
+      if (historyItem && ['completed', 'error', 'cancelled'].includes(historyItem.status)) {
+        continue
+      }
+
+      const createdAt = entry.item?.createdAt ?? Date.now()
+      const restoredItem: DownloadItem = {
+        ...entry.item,
+        id: entry.id,
+        url: entry.options.url,
+        type: entry.options.type,
+        status: 'pending',
+        createdAt,
+        completedAt: undefined
+      }
+
+      this.queue.add(entry.id, entry.options, restoredItem)
+
+      this.upsertHistoryEntry(entry.id, entry.options, {
+        title: restoredItem.title || historyItem?.title || `Download ${entry.id}`,
+        status: 'pending',
+        downloadedAt: historyItem?.downloadedAt ?? createdAt
+      })
+    }
+
+    this.scheduleSessionPersist()
+  }
+
+  flushDownloadSession(): void {
+    if (this.sessionPersistTimer) {
+      clearTimeout(this.sessionPersistTimer)
+      this.sessionPersistTimer = null
+    }
+    this.persistSession()
+  }
+
   updateDownloadInfo(id: string, updates: Partial<DownloadItem>): void {
     this.queue.updateItemInfo(id, updates)
 
@@ -896,6 +1326,9 @@ class DownloadEngine extends EventEmitter {
     if (updates.error !== undefined) {
       historyUpdates.error = updates.error
     }
+    if (updates.ytDlpCommand !== undefined) {
+      historyUpdates.ytDlpCommand = updates.ytDlpCommand
+    }
     if (updates.savedFileName !== undefined) {
       historyUpdates.savedFileName = updates.savedFileName
     }
@@ -903,6 +1336,37 @@ class DownloadEngine extends EventEmitter {
     if (Object.keys(historyUpdates).length > 0) {
       this.upsertHistoryEntry(id, snapshot.options, historyUpdates)
     }
+
+    this.scheduleSessionPersist()
+  }
+
+  private scheduleSessionPersist(): void {
+    if (this.sessionPersistTimer) {
+      return
+    }
+    this.sessionPersistTimer = setTimeout(() => {
+      this.sessionPersistTimer = null
+      this.persistSession()
+    }, 1000)
+  }
+
+  private persistSession(): void {
+    const entries: DownloadSessionItem[] = []
+    const activeEntries = this.queue.getActiveEntries()
+    const queuedEntries = this.queue.getQueuedEntries()
+
+    for (const entry of [...activeEntries, ...queuedEntries]) {
+      if (!entry?.item?.id) {
+        continue
+      }
+      entries.push({
+        id: entry.item.id,
+        options: entry.options,
+        item: entry.item
+      })
+    }
+
+    saveDownloadSession(entries)
   }
 
   private addToHistory(
@@ -960,6 +1424,7 @@ class DownloadEngine extends EventEmitter {
       downloadedAt: updates.downloadedAt ?? Date.now(),
       completedAt: updates.completedAt,
       error: updates.error,
+      ytDlpCommand: updates.ytDlpCommand,
       description: updates.description,
       channel: updates.channel,
       uploader: updates.uploader,

src/main/lib/download-queue.ts

@@ -82,6 +82,28 @@ export class DownloadQueue extends EventEmitter {
     }
   }
 
+  getActiveItems(): DownloadItem[] {
+    return Array.from(this.activeDownloads.values()).map((item) => ({ ...item.item }))
+  }
+
+  getQueuedItems(): DownloadItem[] {
+    return this.queue.map((item) => ({ ...item.item }))
+  }
+
+  getActiveEntries(): Array<{ options: DownloadOptions; item: DownloadItem }> {
+    return Array.from(this.activeDownloads.values()).map((entry) => ({
+      options: { ...entry.options },
+      item: { ...entry.item }
+    }))
+  }
+
+  getQueuedEntries(): Array<{ options: DownloadOptions; item: DownloadItem }> {
+    return this.queue.map((entry) => ({
+      options: { ...entry.options },
+      item: { ...entry.item }
+    }))
+  }
+
   isDownloading(id: string): boolean {
     return this.activeDownloads.has(id)
   }

src/main/lib/download-session-store.ts

@@ -0,0 +1,67 @@
+import fs from 'node:fs'
+import path from 'node:path'
+import { app } from 'electron'
+import type { DownloadItem, DownloadOptions } from '../../shared/types'
+import { scopedLoggers } from '../utils/logger'
+
+export interface DownloadSessionItem {
+  id: string
+  options: DownloadOptions
+  item: DownloadItem
+}
+
+interface DownloadSessionPayload {
+  version: 1
+  updatedAt: number
+  items: DownloadSessionItem[]
+}
+
+const SESSION_FILE_NAME = 'download-session.json'
+
+const getSessionFilePath = (): string => path.join(app.getPath('userData'), SESSION_FILE_NAME)
+
+const isValidItem = (item: DownloadSessionItem): boolean =>
+  Boolean(item?.id && item.options && item.item)
+
+export const loadDownloadSession = (): DownloadSessionItem[] => {
+  const filePath = getSessionFilePath()
+  if (!fs.existsSync(filePath)) {
+    return []
+  }
+
+  try {
+    const raw = fs.readFileSync(filePath, 'utf-8')
+    const payload = JSON.parse(raw) as DownloadSessionPayload
+    if (!payload || payload.version !== 1 || !Array.isArray(payload.items)) {
+      return []
+    }
+    return payload.items.filter(isValidItem)
+  } catch (error) {
+    scopedLoggers.download.warn('Failed to load download session:', error)
+    return []
+  }
+}
+
+export const saveDownloadSession = (items: DownloadSessionItem[]): void => {
+  const filePath = getSessionFilePath()
+  if (items.length === 0) {
+    try {
+      fs.rmSync(filePath, { force: true })
+    } catch (error) {
+      scopedLoggers.download.warn('Failed to clear download session:', error)
+    }
+    return
+  }
+
+  const payload: DownloadSessionPayload = {
+    version: 1,
+    updatedAt: Date.now(),
+    items
+  }
+
+  try {
+    fs.writeFileSync(filePath, JSON.stringify(payload), 'utf-8')
+  } catch (error) {
+    scopedLoggers.download.warn('Failed to save download session:', error)
+  }
+}

src/main/lib/ffmpeg-manager.ts

@@ -2,13 +2,14 @@ import { execSync } from 'node:child_process'
 import fs from 'node:fs'
 import os from 'node:os'
 import path from 'node:path'
+import { scopedLoggers } from '../utils/logger'
 
 class FfmpegManager {
   private ffmpegPath: string | null = null
 
   async initialize(): Promise<void> {
     this.ffmpegPath = await this.findFfmpegBinary()
-    console.log('ffmpeg initialized at:', this.ffmpegPath)
+    scopedLoggers.engine.info('ffmpeg initialized at:', this.ffmpegPath)
   }
 
   getPath(): string {
@@ -27,43 +28,58 @@ class FfmpegManager {
 
   private async findFfmpegBinary(): Promise<string> {
     const platform = os.platform()
-    const resourceCandidates: string[] = []
+    const ffmpegFileName = platform === 'win32' ? 'ffmpeg.exe' : 'ffmpeg'
+    const ffprobeFileName = platform === 'win32' ? 'ffprobe.exe' : 'ffprobe'
 
-    if (process.env.FFMPEG_PATH && fs.existsSync(process.env.FFMPEG_PATH)) {
-      console.log('Using ffmpeg from FFMPEG_PATH:', process.env.FFMPEG_PATH)
-      return process.env.FFMPEG_PATH
+    const resolveBundledFfmpeg = (dirPath: string, label: string): string | null => {
+      const ffmpegPath = path.join(dirPath, ffmpegFileName)
+      const ffprobePath = path.join(dirPath, ffprobeFileName)
+      if (!fs.existsSync(ffmpegPath) || !fs.existsSync(ffprobePath)) {
+        return null
+      }
+      if (platform !== 'win32') {
+        try {
+          fs.chmodSync(ffmpegPath, 0o755)
+          fs.chmodSync(ffprobePath, 0o755)
+        } catch (error) {
+          scopedLoggers.engine.warn(`Failed to set executable permission on ${label}:`, error)
+        }
+      }
+      scopedLoggers.engine.info(`Using ${label}:`, ffmpegPath)
+      return ffmpegPath
     }
 
-    if (platform === 'win32') {
-      resourceCandidates.push('ffmpeg.exe')
-    } else if (platform === 'darwin') {
-      resourceCandidates.push('ffmpeg_macos', 'ffmpeg')
-    } else {
-      resourceCandidates.push('ffmpeg_linux', 'ffmpeg')
+    const envPath = process.env.FFMPEG_PATH
+    if (envPath) {
+      if (!fs.existsSync(envPath)) {
+        throw new Error(
+          'FFMPEG_PATH does not exist. Provide a directory containing ffmpeg and ffprobe.'
+        )
+      }
+      const stats = fs.statSync(envPath)
+      if (!stats.isDirectory()) {
+        throw new Error('FFMPEG_PATH must be a directory containing ffmpeg and ffprobe.')
+      }
+      const resolved = resolveBundledFfmpeg(envPath, 'ffmpeg from FFMPEG_PATH directory')
+      if (resolved) {
+        return resolved
+      }
+      throw new Error('FFMPEG_PATH must contain both ffmpeg and ffprobe.')
     }
 
     const resourcesPath = this.getResourcesPath()
-    for (const candidate of resourceCandidates) {
-      const fullPath = path.join(resourcesPath, candidate)
-      if (fs.existsSync(fullPath)) {
-        if (platform !== 'win32') {
-          try {
-            fs.chmodSync(fullPath, 0o755)
-          } catch (error) {
-            console.warn('Failed to set executable permission on ffmpeg binary:', error)
-          }
-        }
-        console.log('Using bundled ffmpeg:', fullPath)
-        return fullPath
-      }
+    const bundledDir = path.join(resourcesPath, 'ffmpeg')
+    const bundledResolved = resolveBundledFfmpeg(bundledDir, 'bundled ffmpeg')
+    if (bundledResolved) {
+      return bundledResolved
     }
 
     if (platform === 'darwin') {
-      const commonPaths = ['/opt/homebrew/bin/ffmpeg', '/usr/local/bin/ffmpeg']
-      for (const candidate of commonPaths) {
-        if (fs.existsSync(candidate)) {
-          console.log('Using system ffmpeg:', candidate)
-          return candidate
+      const commonDirs = ['/opt/homebrew/bin', '/usr/local/bin']
+      for (const candidate of commonDirs) {
+        const resolved = resolveBundledFfmpeg(candidate, 'system ffmpeg')
+        if (resolved) {
+          return resolved
         }
       }
     }
@@ -72,8 +88,10 @@ class FfmpegManager {
       try {
         const systemPath = execSync('which ffmpeg').toString().trim()
         if (systemPath && fs.existsSync(systemPath)) {
-          console.log('Using system ffmpeg:', systemPath)
-          return systemPath
+          const resolved = resolveBundledFfmpeg(path.dirname(systemPath), 'system ffmpeg')
+          if (resolved) {
+            return resolved
+          }
         }
       } catch (_error) {
         // Ignore error and continue
@@ -84,8 +102,10 @@ class FfmpegManager {
       try {
         const output = execSync('where ffmpeg').toString().split(/\r?\n/)[0]
         if (output && fs.existsSync(output)) {
-          console.log('Using system ffmpeg:', output)
-          return output
+          const resolved = resolveBundledFfmpeg(path.dirname(output), 'system ffmpeg')
+          if (resolved) {
+            return resolved
+          }
         }
       } catch (_error) {
         // Ignore error and continue
@@ -93,7 +113,7 @@ class FfmpegManager {
     }
 
     throw new Error(
-      'ffmpeg not found. Bundle it under resources/ (asarUnpack) or set the FFMPEG_PATH environment variable.'
+      'ffmpeg/ffprobe not found. Bundle them under resources/ffmpeg/ (asarUnpack) or set FFMPEG_PATH to a directory containing both.'
     )
   }
 }

src/main/lib/history-manager.ts

@@ -1,7 +1,7 @@
 import { existsSync, readFileSync, renameSync } from 'node:fs'
 import { join } from 'node:path'
 import DatabaseConstructor from 'better-sqlite3'
-import { eq, sql } from 'drizzle-orm'
+import { eq, inArray, sql } from 'drizzle-orm'
 import type { BetterSQLite3Database } from 'drizzle-orm/better-sqlite3'
 import { drizzle } from 'drizzle-orm/better-sqlite3'
 import { integer, sqliteTable, text } from 'drizzle-orm/sqlite-core'
@@ -36,6 +36,7 @@ const createDownloadHistoryTableSql = sql`
     completed_at INTEGER,
     sort_key INTEGER NOT NULL,
     error TEXT,
+    yt_dlp_command TEXT,
     description TEXT,
     channel TEXT,
     uploader TEXT,
@@ -218,7 +219,12 @@ class HistoryManager {
       }
 
       const deprecatedColumns = ['subscription_title', 'format', 'quality', 'codec']
-      const needsRebuild = columns.some((column) => deprecatedColumns.includes(column.name))
+      const requiredColumns = ['yt_dlp_command']
+      const hasDeprecated = columns.some((column) => deprecatedColumns.includes(column.name))
+      const missingRequired = requiredColumns.some(
+        (columnName) => !columns.some((column) => column.name === columnName)
+      )
+      const needsRebuild = hasDeprecated || missingRequired
       if (needsRebuild) {
         this.rebuildDownloadHistoryTable()
       }
@@ -387,6 +393,7 @@ class HistoryManager {
       completedAt: item.completedAt ?? null,
       sortKey: item.completedAt ?? item.downloadedAt,
       error: item.error ?? null,
+      ytDlpCommand: item.ytDlpCommand ?? null,
       description: item.description ?? null,
       channel: item.channel ?? null,
       uploader: item.uploader ?? null,
@@ -433,6 +440,7 @@ class HistoryManager {
       downloadedAt: row.downloadedAt,
       completedAt: row.completedAt ?? undefined,
       error: row.error ?? undefined,
+      ytDlpCommand: row.ytDlpCommand ?? undefined,
       description: row.description ?? undefined,
       channel: row.channel ?? undefined,
       uploader: row.uploader ?? undefined,
@@ -494,6 +502,61 @@ class HistoryManager {
     }
   }
 
+  removeHistoryItems(ids: string[]): number {
+    const uniqueIds = Array.from(new Set(ids)).filter((id) => id.trim().length > 0)
+    if (uniqueIds.length === 0) {
+      return 0
+    }
+    let removedCount = 0
+    try {
+      const database = this.getDatabase()
+      const result = database
+        .delete(downloadHistoryTable)
+        .where(inArray(downloadHistoryTable.id, uniqueIds))
+        .run()
+      for (const id of uniqueIds) {
+        if (this.history.delete(id)) {
+          removedCount++
+        }
+      }
+      if ((result.changes ?? 0) > removedCount) {
+        removedCount = result.changes ?? removedCount
+      }
+      return removedCount
+    } catch (error) {
+      logger.error('history-db failed to delete items', { count: uniqueIds.length, error })
+      return removedCount
+    }
+  }
+
+  removeHistoryByPlaylistId(playlistId: string): number {
+    const normalized = playlistId.trim()
+    if (!normalized) {
+      return 0
+    }
+    let removedCount = 0
+    try {
+      const database = this.getDatabase()
+      const result = database
+        .delete(downloadHistoryTable)
+        .where(eq(downloadHistoryTable.playlistId, normalized))
+        .run()
+      for (const [id, item] of this.history.entries()) {
+        if (item.playlistId === normalized) {
+          this.history.delete(id)
+          removedCount++
+        }
+      }
+      if ((result.changes ?? 0) > removedCount) {
+        removedCount = result.changes ?? removedCount
+      }
+      return removedCount
+    } catch (error) {
+      logger.error('history-db failed to delete playlist items', { playlistId: normalized, error })
+      return removedCount
+    }
+  }
+
   clearHistory(): void {
     try {
       const database = this.getDatabase()

src/main/lib/subscription-manager.ts

@@ -99,6 +99,22 @@ export class SubscriptionManager extends EventEmitter {
     return this.attachFeedItems([this.mapRowToRecord(row)])[0]
   }
 
+  findDuplicateFeed(
+    feedUrl: string,
+    ignoreId?: string
+  ): { id: string; feedUrl: string } | undefined {
+    const database = this.getDatabase()
+    const rows = database
+      .select({ id: subscriptionsTable.id, feedUrl: subscriptionsTable.feedUrl })
+      .from(subscriptionsTable)
+      .all()
+    const targetKey = this.buildFeedKey(feedUrl)
+    if (!targetKey) {
+      return undefined
+    }
+    return rows.find((row) => row.id !== ignoreId && this.buildFeedKey(row.feedUrl) === targetKey)
+  }
+
   add(payload: SubscriptionCreatePayload): SubscriptionRule {
     const timestamp = Date.now()
     const keywords = sanitizeList(payload.keywords)
@@ -301,6 +317,25 @@ export class SubscriptionManager extends EventEmitter {
     return this.db
   }
 
+  private buildFeedKey(feedUrl: string): string {
+    const trimmed = feedUrl.trim()
+    if (!trimmed) {
+      return ''
+    }
+    const normalized = /^https?:\/\//i.test(trimmed) ? trimmed : `https://${trimmed}`
+    try {
+      const url = new URL(normalized)
+      let pathname = url.pathname || '/'
+      pathname = pathname.replace(/\/+$/, '')
+      if (!pathname) {
+        pathname = '/'
+      }
+      return `${url.host.toLowerCase()}${pathname}${url.search}`
+    } catch {
+      return trimmed.toLowerCase()
+    }
+  }
+
   private ensureItemsSchema(): void {
     if (!this.sqlite) {
       return
@@ -493,7 +528,9 @@ export class SubscriptionManager extends EventEmitter {
 
   private migrateLegacyStore(): void {
     try {
-      const LegacyStore = require('electron-store')
+      const ElectronStore = require('electron-store')
+      // Access the default export
+      const LegacyStore = ElectronStore.default || ElectronStore
       const store = new LegacyStore({
         name: 'subscriptions',
         defaults: {

src/main/lib/subscription-scheduler.ts

@@ -3,6 +3,11 @@ import fs from 'node:fs'
 import log from 'electron-log/main'
 import Parser from 'rss-parser'
 import type { SubscriptionFeedItem, SubscriptionRule } from '../../shared/types'
+import { DEFAULT_SUBSCRIPTION_FILENAME_TEMPLATE } from '../../shared/types'
+import {
+  buildAudioFormatPreference,
+  buildVideoFormatPreference
+} from '../../shared/utils/format-preferences'
 import { settingsManager } from '../settings'
 import { downloadEngine } from './download-engine'
 import { historyManager } from './history-manager'
@@ -18,6 +23,11 @@ type ParserItem = {
   isoDate?: string
   pubDate?: string
   youtubeId?: string
+  content?: string
+  contentSnippet?: string
+  contentEncoded?: string
+  summary?: string
+  description?: string
   mediaThumbnail?: Array<{ url?: string }> | { url?: string }
   mediaContent?: Array<{ url?: string }> | { url?: string }
   enclosure?: Array<{ url?: string; type?: string }> | { url?: string; type?: string }
@@ -40,24 +50,19 @@ type FeedItem = {
   thumbnail?: string
 }
 
-const parser = new Parser<{ item: ParserItem }>({
+const parser = new Parser<Record<string, never>, ParserItem>({
   customFields: {
     item: [
       ['yt:videoId', 'youtubeId'],
       ['media:thumbnail', 'mediaThumbnail'],
       ['media:content', 'mediaContent'],
-      ['enclosure', 'enclosure']
+      ['enclosure', 'enclosure'],
+      ['content:encoded', 'contentEncoded'],
+      ['description', 'description']
     ]
   }
 })
 
-const clampIntervalHours = (value: number | undefined): number => {
-  if (!value || Number.isNaN(value)) {
-    return 3
-  }
-  return Math.min(24, Math.max(1, value))
-}
-
 const sanitizeDownloadId = (subscriptionId: string, itemId: string): string => {
   const base = Buffer.from(`${subscriptionId}:${itemId}`).toString('base64url')
   return `sub_${base}`
@@ -166,7 +171,7 @@ export class SubscriptionScheduler extends EventEmitter {
     if (this.timer) {
       clearTimeout(this.timer)
     }
-    const intervalHours = clampIntervalHours(settingsManager.get('subscriptionCheckIntervalHours'))
+    const intervalHours = 3 // Default check interval: 3 hours
     const delayMs = initialDelay ?? intervalHours * 60 * 60 * 1000
     this.timer = setTimeout(() => {
       void this.checkAll().finally(() => this.scheduleNextRun())
@@ -239,13 +244,18 @@ export class SubscriptionScheduler extends EventEmitter {
       }
 
       const latestItem = normalizedItems[0]
+      const coverUrl = this.resolveSubscriptionCover(
+        feed,
+        normalizedItems,
+        feedItems as ParserItem[]
+      )
       subscriptionManager.update(subscription.id, {
         status: 'up-to-date',
         lastSuccessAt: Date.now(),
         lastError: undefined,
         latestVideoTitle: latestItem?.title ?? subscription.latestVideoTitle,
         latestVideoPublishedAt: latestItem?.publishedAt ?? subscription.latestVideoPublishedAt,
-        coverUrl: (feed.image as { url?: string } | undefined)?.url ?? subscription.coverUrl,
+        coverUrl: coverUrl ?? subscription.coverUrl,
         title:
           typeof feed.title === 'string' && feed.title.trim().length > 0
             ? feed.title.trim()
@@ -365,6 +375,74 @@ export class SubscriptionScheduler extends EventEmitter {
       return mediaContent.url as string | undefined
     }
 
+    // Try to parse an image from HTML fields
+    const htmlCandidates = [
+      item.content,
+      item.contentEncoded,
+      item.description,
+      item.summary,
+      item.contentSnippet
+    ]
+    for (const html of htmlCandidates) {
+      const imageUrl = this.extractImageFromHtml(html)
+      if (imageUrl) {
+        return imageUrl
+      }
+    }
+
+    return undefined
+  }
+
+  private resolveSubscriptionCover(
+    feed: Parser.Output<ParserItem>,
+    items: FeedItem[],
+    rawItems: ParserItem[]
+  ): string | undefined {
+    const feedImageUrl = typeof feed.image?.url === 'string' ? feed.image.url : undefined
+    if (feedImageUrl) {
+      return feedImageUrl
+    }
+
+    const itunesImageUrl = typeof feed.itunes?.image === 'string' ? feed.itunes.image : undefined
+    if (itunesImageUrl) {
+      return itunesImageUrl
+    }
+
+    const itemThumbnail = items.find((item) => item.thumbnail)?.thumbnail
+    if (itemThumbnail) {
+      return itemThumbnail
+    }
+
+    for (const item of rawItems) {
+      const thumbnail = this.resolveThumbnail(item)
+      if (thumbnail) {
+        return thumbnail
+      }
+    }
+
+    return undefined
+  }
+
+  private extractImageFromHtml(html?: string): string | undefined {
+    if (!html) {
+      return undefined
+    }
+
+    const srcMatch = html.match(
+      /<img\b[^>]*\b(?:src|data-src|data-original)\b\s*=\s*(['"]?)([^'">\s]+)\1/i
+    )
+    if (srcMatch?.[2]) {
+      return srcMatch[2]
+    }
+
+    const srcsetMatch = html.match(/<img[^>]+srcset\s*=\s*(['"])([^'"]+)\1/i)
+    if (srcsetMatch?.[2]) {
+      const firstCandidate = srcsetMatch[2].split(',')[0]?.trim().split(/\s+/)[0]
+      if (firstCandidate) {
+        return firstCandidate
+      }
+    }
+
     return undefined
   }
 
@@ -406,7 +484,12 @@ export class SubscriptionScheduler extends EventEmitter {
     const settings = settingsManager.getAll()
     const downloadDirectory = subscription.downloadDirectory?.trim() || settings.downloadPath
     const namingTemplate =
-      subscription.namingTemplate?.trim() || settings.subscriptionFilenameTemplate
+      subscription.namingTemplate?.trim() || DEFAULT_SUBSCRIPTION_FILENAME_TEMPLATE
+    const downloadType = settings.oneClickDownloadType ?? 'video'
+    const formatPreference =
+      downloadType === 'video'
+        ? buildVideoFormatPreference(settings)
+        : buildAudioFormatPreference(settings)
     ensureDirectoryExists(downloadDirectory)
 
     const tags = Array.from(new Set([subscription.platform, ...subscription.tags]))
@@ -414,7 +497,8 @@ export class SubscriptionScheduler extends EventEmitter {
     try {
       downloadEngine.startDownload(downloadId, {
         url,
-        type: 'video',
+        type: downloadType,
+        format: formatPreference,
         customDownloadPath: downloadDirectory,
         customFilenameTemplate: namingTemplate,
         tags,

src/main/lib/thumbnail-cache.ts

@@ -2,8 +2,9 @@ import crypto from 'node:crypto'
 import fs from 'node:fs'
 import fsPromises from 'node:fs/promises'
 import path from 'node:path'
-import { pathToFileURL } from 'node:url'
+import { APP_PROTOCOL_SCHEME } from '@shared/constants'
 import { app } from 'electron'
+import { scopedLoggers } from '../utils/logger'
 
 const SUPPORTED_EXTENSIONS = new Set(['.jpg', '.jpeg', '.png', '.webp', '.gif'])
 
@@ -37,7 +38,11 @@ export class ThumbnailCache {
       return null
     }
 
-    if (originalUrl.startsWith('file://') || originalUrl.startsWith('data:')) {
+    if (
+      originalUrl.startsWith(APP_PROTOCOL_SCHEME) ||
+      originalUrl.startsWith('file://') ||
+      originalUrl.startsWith('data:')
+    ) {
       return originalUrl
     }
 
@@ -59,7 +64,7 @@ export class ThumbnailCache {
 
       const existingPath = await this.findExistingPath(basePath, defaultExtension)
       if (existingPath) {
-        return pathToFileURL(existingPath).toString()
+        return this.toAppProtocolUrl(existingPath)
       }
 
       const response = await fetch(originalUrl)
@@ -75,9 +80,9 @@ export class ThumbnailCache {
       const finalPath = `${basePath}${extension}`
 
       await fsPromises.writeFile(finalPath, buffer)
-      return pathToFileURL(finalPath).toString()
+      return this.toAppProtocolUrl(finalPath)
     } catch (error) {
-      console.error('Failed to cache thumbnail:', error)
+      scopedLoggers.thumbnail.error('Failed to cache thumbnail:', error)
       return null
     }
   }
@@ -132,6 +137,13 @@ export class ThumbnailCache {
     const basePath = path.join(cacheDir, `${hash}`)
     return { basePath, defaultExtension: extension }
   }
+
+  private toAppProtocolUrl(filePath: string): string {
+    const userDataPath = app.getPath('userData')
+    const relativePath = path.relative(userDataPath, filePath).replace(/\\/g, '/')
+
+    return `${APP_PROTOCOL_SCHEME}${relativePath}`
+  }
 }
 
 export const thumbnailCache = new ThumbnailCache()

src/main/lib/ytdlp-manager.ts

@@ -3,6 +3,7 @@ import fs from 'node:fs'
 import os from 'node:os'
 import path from 'node:path'
 import type YTDlpWrap from 'yt-dlp-wrap-plus'
+import { scopedLoggers } from '../utils/logger'
 
 // Use require for yt-dlp-wrap-plus to handle CommonJS/ESM compatibility
 const YTDlpWrapModule = require('yt-dlp-wrap-plus')
@@ -12,11 +13,13 @@ type YTDlpWrapInstance = InstanceType<typeof YTDlpWrapCtor>
 class YtDlpManager {
   private ytdlpPath: string | null = null
   private ytdlpInstance: YTDlpWrapInstance | null = null
+  private jsRuntimeArgs: string[] = []
 
   async initialize(): Promise<void> {
     this.ytdlpPath = await this.findOrDownloadYtDlp()
     this.ytdlpInstance = new YTDlpWrapCtor(this.ytdlpPath)
-    console.log('yt-dlp initialized at:', this.ytdlpPath)
+    this.jsRuntimeArgs = this.resolveJsRuntimeArgs()
+    scopedLoggers.engine.info('yt-dlp initialized at:', this.ytdlpPath)
   }
 
   getInstance(): YTDlpWrapInstance {
@@ -33,6 +36,10 @@ class YtDlpManager {
     return this.ytdlpPath
   }
 
+  getJsRuntimeArgs(): string[] {
+    return [...this.jsRuntimeArgs]
+  }
+
   private getResourcesPath(): string {
     // In development, read from project root's resources
     if (process.env.NODE_ENV === 'development') {
@@ -57,7 +64,7 @@ class YtDlpManager {
 
     // Check environment variable first
     if (process.env.YTDLP_PATH && fs.existsSync(process.env.YTDLP_PATH)) {
-      console.log('Using yt-dlp from YTDLP_PATH:', process.env.YTDLP_PATH)
+      scopedLoggers.engine.info('Using yt-dlp from YTDLP_PATH:', process.env.YTDLP_PATH)
       return process.env.YTDLP_PATH
     }
 
@@ -65,13 +72,13 @@ class YtDlpManager {
     const resourcesPath = this.getResourcesPath()
     const bundledPath = path.join(resourcesPath, bundledName)
     if (fs.existsSync(bundledPath)) {
-      console.log('Using bundled yt-dlp:', bundledPath)
+      scopedLoggers.engine.info('Using bundled yt-dlp:', bundledPath)
       // Make executable on Unix-like systems if needed
       if (platform !== 'win32') {
         try {
           fs.chmodSync(bundledPath, 0o755)
         } catch (error) {
-          console.warn('Failed to set executable permission:', error)
+          scopedLoggers.engine.warn('Failed to set executable permission:', error)
         }
       }
       return bundledPath
@@ -82,7 +89,7 @@ class YtDlpManager {
       const possiblePaths = ['/opt/homebrew/bin/yt-dlp', '/usr/local/bin/yt-dlp']
       for (const p of possiblePaths) {
         if (fs.existsSync(p)) {
-          console.log('Using system yt-dlp:', p)
+          scopedLoggers.engine.info('Using system yt-dlp:', p)
           return p
         }
       }
@@ -93,7 +100,7 @@ class YtDlpManager {
       try {
         const systemPath = execSync('which yt-dlp').toString().trim()
         if (systemPath && fs.existsSync(systemPath)) {
-          console.log('Using system yt-dlp:', systemPath)
+          scopedLoggers.engine.info('Using system yt-dlp:', systemPath)
           return systemPath
         }
       } catch (_error) {
@@ -115,6 +122,92 @@ class YtDlpManager {
     )
   }
 
+  private resolveJsRuntimeArgs(): string[] {
+    const runtime = (process.env.YTDLP_JS_RUNTIME || 'deno').trim()
+    if (!runtime || runtime === 'none') {
+      return []
+    }
+
+    const runtimePath = this.resolveJsRuntimePath(runtime)
+    if (runtimePath) {
+      return ['--js-runtimes', `${runtime}:${runtimePath}`]
+    }
+
+    if (process.env.YTDLP_JS_RUNTIME) {
+      scopedLoggers.engine.warn(
+        `Requested JS runtime "${runtime}" was not found. Falling back to yt-dlp default detection.`
+      )
+    } else {
+      scopedLoggers.engine.warn(
+        'JS runtime not found. YouTube support may be limited without an external JS runtime.'
+      )
+    }
+
+    return process.env.YTDLP_JS_RUNTIME ? ['--js-runtimes', runtime] : []
+  }
+
+  private resolveJsRuntimePath(runtime: string): string | null {
+    const envPath = process.env.YTDLP_JS_RUNTIME_PATH?.trim()
+    if (envPath && fs.existsSync(envPath)) {
+      scopedLoggers.engine.info('Using JS runtime from YTDLP_JS_RUNTIME_PATH:', envPath)
+      return envPath
+    }
+
+    const platform = os.platform()
+    const resourcesPath = this.getResourcesPath()
+    const resourceCandidates: string[] = []
+
+    if (runtime === 'deno') {
+      resourceCandidates.push(platform === 'win32' ? 'deno.exe' : 'deno')
+    } else if (runtime === 'node') {
+      resourceCandidates.push(platform === 'win32' ? 'node.exe' : 'node')
+    } else if (runtime === 'bun') {
+      resourceCandidates.push(platform === 'win32' ? 'bun.exe' : 'bun')
+    } else if (runtime === 'quickjs') {
+      resourceCandidates.push(platform === 'win32' ? 'qjs.exe' : 'qjs')
+    } else {
+      resourceCandidates.push(runtime)
+      if (platform === 'win32' && !runtime.endsWith('.exe')) {
+        resourceCandidates.push(`${runtime}.exe`)
+      }
+    }
+
+    for (const candidate of resourceCandidates) {
+      const fullPath = path.join(resourcesPath, candidate)
+      if (fs.existsSync(fullPath)) {
+        if (platform !== 'win32') {
+          try {
+            fs.chmodSync(fullPath, 0o755)
+          } catch (error) {
+            scopedLoggers.engine.warn('Failed to set executable permission on JS runtime:', error)
+          }
+        }
+        scopedLoggers.engine.info('Using bundled JS runtime:', fullPath)
+        return fullPath
+      }
+    }
+
+    try {
+      if (platform === 'win32') {
+        const output = execSync(`where ${runtime}`).toString().split(/\r?\n/)[0]
+        if (output && fs.existsSync(output)) {
+          scopedLoggers.engine.info('Using system JS runtime:', output)
+          return output
+        }
+      } else {
+        const systemPath = execSync(`which ${runtime}`).toString().trim()
+        if (systemPath && fs.existsSync(systemPath)) {
+          scopedLoggers.engine.info('Using system JS runtime:', systemPath)
+          return systemPath
+        }
+      }
+    } catch (_error) {
+      // Runtime not found in PATH
+    }
+
+    return null
+  }
+
   // Removed runtime download/update to avoid network dependency in production builds
 }
 

src/main/local-api.ts

@@ -0,0 +1,191 @@
+import crypto from 'node:crypto'
+import http from 'node:http'
+import type { AddressInfo } from 'node:net'
+
+import log from 'electron-log/main'
+
+import { downloadEngine } from './lib/download-engine'
+
+const PORT_RANGE_START = 27100
+const PORT_RANGE_END = 27120
+const TOKEN_TTL_MS = 60_000
+
+type TokenRecord = {
+  expiresAt: number
+}
+
+let server: http.Server | null = null
+let serverPort: number | null = null
+const tokens = new Map<string, TokenRecord>()
+
+const isLoopbackAddress = (address?: string | null): boolean => {
+  if (!address) return false
+  return address === '127.0.0.1' || address === '::1' || address === '::ffff:127.0.0.1'
+}
+
+const writeJson = (res: http.ServerResponse, status: number, body: unknown): void => {
+  res.writeHead(status, {
+    'Content-Type': 'application/json; charset=utf-8',
+    'Access-Control-Allow-Origin': '*',
+    'Access-Control-Allow-Methods': 'GET, OPTIONS',
+    'Access-Control-Allow-Headers': 'Content-Type'
+  })
+  res.end(JSON.stringify(body))
+}
+
+const writeEmpty = (res: http.ServerResponse, status: number): void => {
+  res.writeHead(status, {
+    'Access-Control-Allow-Origin': '*',
+    'Access-Control-Allow-Methods': 'GET, OPTIONS',
+    'Access-Control-Allow-Headers': 'Content-Type'
+  })
+  res.end()
+}
+
+const issueToken = (): string => {
+  const token = crypto.randomBytes(16).toString('hex')
+  tokens.set(token, { expiresAt: Date.now() + TOKEN_TTL_MS })
+  return token
+}
+
+const consumeToken = (token?: string | null): boolean => {
+  if (!token) return false
+  const record = tokens.get(token)
+  if (!record) return false
+  if (Date.now() > record.expiresAt) {
+    tokens.delete(token)
+    return false
+  }
+  tokens.delete(token)
+  return true
+}
+
+const handleRequest = async (
+  req: http.IncomingMessage,
+  res: http.ServerResponse
+): Promise<void> => {
+  try {
+    if (!isLoopbackAddress(req.socket.remoteAddress)) {
+      writeJson(res, 403, { error: 'Forbidden' })
+      return
+    }
+
+    if (req.method === 'OPTIONS') {
+      writeEmpty(res, 204)
+      return
+    }
+
+    if (!req.url) {
+      writeJson(res, 400, { error: 'Missing URL' })
+      return
+    }
+
+    const requestUrl = new URL(req.url, 'http://127.0.0.1')
+    const pathname = requestUrl.pathname
+
+    if (req.method !== 'GET') {
+      writeJson(res, 405, { error: 'Method not allowed' })
+      return
+    }
+
+    if (pathname === '/token') {
+      const token = issueToken()
+      writeJson(res, 200, { token, expiresInMs: TOKEN_TTL_MS })
+      return
+    }
+
+    if (pathname === '/video-info') {
+      const token = requestUrl.searchParams.get('token')
+      if (!consumeToken(token)) {
+        writeJson(res, 401, { error: 'Invalid token' })
+        return
+      }
+
+      const targetUrl = requestUrl.searchParams.get('url')
+      if (!targetUrl || !targetUrl.trim()) {
+        writeJson(res, 400, { error: 'Missing url' })
+        return
+      }
+
+      try {
+        const info = await downloadEngine.getVideoInfo(targetUrl.trim())
+        writeJson(res, 200, {
+          title: info.title,
+          thumbnail: info.thumbnail,
+          duration: info.duration,
+          formats: info.formats ?? []
+        })
+      } catch (error) {
+        const message = error instanceof Error ? error.message : 'Failed to fetch video info'
+        const details =
+          error instanceof Error
+            ? error.stack
+            : typeof error === 'object' && error && 'stderr' in error
+              ? String((error as { stderr?: unknown }).stderr ?? '')
+              : undefined
+        writeJson(res, 500, { error: message, details })
+      }
+      return
+    }
+
+    if (pathname === '/status') {
+      writeJson(res, 200, { ok: true })
+      return
+    }
+
+    writeJson(res, 404, { error: 'Not found' })
+  } catch (error) {
+    const message = error instanceof Error ? error.message : 'Unhandled request error'
+    writeJson(res, 500, { error: message })
+  }
+}
+
+const startServerOnPort = (port: number): Promise<http.Server> =>
+  new Promise((resolve, reject) => {
+    const httpServer = http.createServer((req, res) => {
+      void handleRequest(req, res)
+    })
+
+    httpServer.once('error', (error) => {
+      httpServer.close()
+      reject(error)
+    })
+
+    httpServer.listen(port, '127.0.0.1', () => resolve(httpServer))
+  })
+
+export async function startExtensionApiServer(): Promise<number | null> {
+  if (server && serverPort) {
+    return serverPort
+  }
+
+  for (let port = PORT_RANGE_START; port <= PORT_RANGE_END; port += 1) {
+    try {
+      server = await startServerOnPort(port)
+      const address = server.address() as AddressInfo | null
+      serverPort = address?.port ?? port
+      log.info(`Extension API listening on 127.0.0.1:${serverPort}`)
+      return serverPort
+    } catch (error) {
+      const err = error as NodeJS.ErrnoException
+      if (err.code !== 'EADDRINUSE') {
+        log.warn('Extension API failed to start on port:', port, err)
+      }
+    }
+  }
+
+  log.error(`Extension API failed to bind any port in range ${PORT_RANGE_START}-${PORT_RANGE_END}`)
+  return null
+}
+
+export async function stopExtensionApiServer(): Promise<void> {
+  if (!server) return
+
+  await new Promise<void>((resolve) => {
+    server?.close(() => resolve())
+  })
+
+  server = null
+  serverPort = null
+  tokens.clear()
+}

src/main/settings.ts

@@ -3,6 +3,7 @@ import os from 'node:os'
 import path from 'node:path'
 import type { AppSettings } from '../shared/types'
 import { defaultSettings } from '../shared/types'
+import { scopedLoggers } from './utils/logger'
 
 // Use require for electron-store to avoid CommonJS/ESM issues
 const ElectronStore = require('electron-store')
@@ -10,19 +11,16 @@ const ElectronStore = require('electron-store')
 const Store = ElectronStore.default || ElectronStore
 
 const OLD_DEFAULT_DOWNLOAD_PATH = path.join(os.homedir(), 'Downloads')
-
 const ensureDirectoryExists = (dir: string) => {
   try {
     fs.mkdirSync(dir, { recursive: true })
   } catch (error) {
-    console.error('Failed to ensure download directory:', error)
+    scopedLoggers.system.error('Failed to ensure download directory:', error)
   }
 }
 
 const resolveDefaultDownloadPath = () => {
-  const downloadDir = path.join(os.homedir(), 'Downloads', 'VidBee')
-  ensureDirectoryExists(downloadDir)
-  return downloadDir
+  return path.join(os.homedir(), 'Downloads', 'VidBee')
 }
 
 const DEFAULT_DOWNLOAD_PATH = resolveDefaultDownloadPath()
@@ -53,7 +51,11 @@ class SettingsManager {
   }
 
   getAll(): AppSettings {
-    return this.store.store
+    return {
+      ...defaultSettings,
+      downloadPath: DEFAULT_DOWNLOAD_PATH,
+      ...this.store.store
+    }
   }
 
   setAll(settings: Partial<AppSettings>): void {
@@ -71,7 +73,6 @@ class SettingsManager {
       ...defaultSettings,
       downloadPath: DEFAULT_DOWNLOAD_PATH
     })
-    ensureDirectoryExists(DEFAULT_DOWNLOAD_PATH)
   }
 
   private ensureDownloadDirectory(): void {
@@ -84,9 +85,8 @@ class SettingsManager {
       if (normalizedDownloadPath !== currentPath) {
         this.store.set('downloadPath', normalizedDownloadPath)
       }
-      ensureDirectoryExists(normalizedDownloadPath)
     } catch (error) {
-      console.error('Failed to verify download directory:', error)
+      scopedLoggers.system.error('Failed to verify download directory:', error)
     }
   }
 }

src/main/utils/path-helpers.ts

@@ -0,0 +1,19 @@
+import os from 'node:os'
+import path from 'node:path'
+
+export const resolvePathWithHome = (rawPath?: string | null): string | undefined => {
+  const trimmed = rawPath?.trim()
+  if (!trimmed) {
+    return undefined
+  }
+
+  if (trimmed === '~') {
+    return os.homedir()
+  }
+
+  if (trimmed.startsWith('~/') || trimmed.startsWith('~\\')) {
+    return path.join(os.homedir(), trimmed.slice(2))
+  }
+
+  return trimmed
+}

src/preload/index.d.ts

@@ -5,7 +5,7 @@ declare global {
   interface Window {
     electron: ElectronAPI
     api: IpcServices & {
-      on: (channel: string, callback: (...args: unknown[]) => void) => void
+      on: (channel: string, callback: (...args: unknown[]) => void) => (...args: unknown[]) => void
       removeListener: (channel: string, callback: (...args: unknown[]) => void) => void
       send: (channel: string, ...args: unknown[]) => void
     }

src/renderer/index.html

@@ -5,7 +5,7 @@
   <meta charset="UTF-8" />
   <title>VidBee</title>
   <meta http-equiv="Content-Security-Policy"
-    content="default-src 'self'; script-src 'self' 'unsafe-eval' https://rybbit.102417.xyz; style-src 'self' 'unsafe-inline'; img-src 'self' data: file: https://i.ytimg.com https://img.youtube.com; connect-src 'self' https://rybbit.102417.xyz" />
+    content="default-src 'self'; script-src 'self' 'unsafe-eval' https://rybbit.102417.xyz; style-src 'self' 'unsafe-inline'; img-src 'self' data: file: vidbee: https://i.ytimg.com https://img.youtube.com; connect-src 'self' https://rybbit.102417.xyz" />
 </head>
 
 <body>

src/renderer/src/App.tsx

@@ -1,39 +1,105 @@
-import { ScrollArea } from '@renderer/components/ui/scroll-area'
 import { Sidebar } from '@renderer/components/ui/sidebar'
 import { Toaster } from '@renderer/components/ui/sonner'
 import { TitleBar } from '@renderer/components/ui/title-bar'
 import type { SubscriptionRule } from '@shared/types'
 import { useAtom, useSetAtom } from 'jotai'
 import { ThemeProvider } from 'next-themes'
-import { useEffect, useRef, useState } from 'react'
+import { useCallback, useEffect, useRef, useState } from 'react'
 import { useTranslation } from 'react-i18next'
+import { HashRouter, Navigate, Route, Routes, useLocation, useNavigate } from 'react-router'
 import { toast } from 'sonner'
+import { ErrorBoundary } from './components/error/ErrorBoundary'
+import { useDownloadEvents } from './hooks/use-download-events'
 import { ipcEvents, ipcServices } from './lib/ipc'
 import { About } from './pages/About'
 import { Home } from './pages/Home'
 import { Settings } from './pages/Settings'
 import { Subscriptions } from './pages/Subscriptions'
-import { SupportedSites } from './pages/SupportedSites'
 import { loadSettingsAtom, settingsAtom } from './store/settings'
 import { loadSubscriptionsAtom, setSubscriptionsAtom } from './store/subscriptions'
+import { updateAvailableAtom, updateReadyAtom } from './store/update'
 
-type Page = 'home' | 'subscriptions' | 'settings' | 'about' | 'sites'
+type Page = 'home' | 'subscriptions' | 'settings' | 'about'
+
+const pageToPath: Record<Page, string> = {
+  home: '/',
+  subscriptions: '/subscriptions',
+  settings: '/settings',
+  about: '/about'
+}
+
+const normalizePathname = (pathname: string): string => {
+  const trimmed = pathname.replace(/\/+$/, '')
+  return trimmed === '' ? '/' : trimmed
+}
+
+const pathToPage = (pathname: string): Page => {
+  const normalized = normalizePathname(pathname)
+  switch (normalized) {
+    case '/subscriptions':
+      return 'subscriptions'
+    case '/settings':
+      return 'settings'
+    case '/about':
+      return 'about'
+    default:
+      return 'home'
+  }
+}
 
 function AppContent() {
-  const [currentPage, setCurrentPage] = useState<Page>('home')
   const [platform, setPlatform] = useState<string>('')
   const loadSubscriptions = useSetAtom(loadSubscriptionsAtom)
   const setSubscriptions = useSetAtom(setSubscriptionsAtom)
   const [settings] = useAtom(settingsAtom)
   const loadSettings = useSetAtom(loadSettingsAtom)
-  const { t } = useTranslation()
+  const setUpdateReady = useSetAtom(updateReadyAtom)
+  const setUpdateAvailable = useSetAtom(updateAvailableAtom)
+  const { i18n } = useTranslation()
   const updateDownloadInProgressRef = useRef(false)
   const analyticsScriptRef = useRef<HTMLScriptElement | null>(null)
+  const navigate = useNavigate()
+  const location = useLocation()
+  const currentPage = pathToPage(location.pathname)
+  const supportedSitesUrl = 'https://vidbee.org/supported-sites/'
+
+  useDownloadEvents()
+
+  const handlePageChange = useCallback(
+    (page: Page) => {
+      const targetPath = pageToPath[page] ?? '/'
+      if (normalizePathname(location.pathname) !== targetPath) {
+        navigate(targetPath)
+      }
+    },
+    [location.pathname, navigate]
+  )
+
+  const handleOpenSupportedSites = () => {
+    window.open(supportedSitesUrl, '_blank')
+  }
 
   useEffect(() => {
     loadSettings()
   }, [loadSettings])
 
+  useEffect(() => {
+    const handleDeepLink = (rawUrl: unknown) => {
+      const url = typeof rawUrl === 'string' ? rawUrl.trim() : ''
+      if (!url) {
+        return
+      }
+      // Switch to home page to show download dialog
+      handlePageChange('home')
+      // The DownloadDialog component will handle opening the dialog and parsing the video
+    }
+
+    ipcEvents.on('download:deeplink', handleDeepLink)
+    return () => {
+      ipcEvents.removeListener('download:deeplink', handleDeepLink)
+    }
+  }, [handlePageChange])
+
   useEffect(() => {
     loadSubscriptions()
 
@@ -108,10 +174,39 @@ function AppContent() {
       return
     }
 
-    const showRestartPrompt = () => {
-      toast.info(t('about.notifications.restartToUpdate'), {
+    const resetDownloadState = () => {
+      if (updateDownloadInProgressRef.current) {
+        updateDownloadInProgressRef.current = false
+      }
+    }
+
+    const handleUpdateAvailable = (rawInfo: unknown) => {
+      const info = (rawInfo ?? {}) as { version?: string }
+      setUpdateAvailable({
+        available: true,
+        version: info.version
+      })
+    }
+
+    const handleUpdateDownloaded = (rawInfo: unknown) => {
+      const info = (rawInfo ?? {}) as { version?: string }
+      resetDownloadState()
+      setUpdateReady({
+        ready: true,
+        version: info.version
+      })
+      setUpdateAvailable({
+        available: true,
+        version: info.version
+      })
+
+      const versionLabel = info?.version ?? ''
+      const downloadedMessage = versionLabel
+        ? i18n.t('about.notifications.updateDownloadedVersion', { version: versionLabel })
+        : i18n.t('about.notifications.updateDownloaded')
+      toast.info(downloadedMessage, {
         action: {
-          label: t('about.notifications.restartNowAction'),
+          label: i18n.t('about.notifications.restartNowAction'),
           onClick: () => {
             void ipcServices.update.quitAndInstall()
           }
@@ -119,31 +214,12 @@ function AppContent() {
       })
     }
 
-    const resetDownloadState = () => {
-      if (updateDownloadInProgressRef.current) {
-        updateDownloadInProgressRef.current = false
-      }
-    }
-
-    const handleUpdateDownloaded = (rawInfo: unknown) => {
-      const info = (rawInfo ?? {}) as { version?: string }
-      resetDownloadState()
-
-      const versionLabel = info?.version ?? ''
-      const downloadedMessage = versionLabel
-        ? t('about.notifications.updateDownloadedVersion', { version: versionLabel })
-        : t('about.notifications.updateDownloaded')
-      toast.success(downloadedMessage)
-
-      showRestartPrompt()
-    }
-
     const handleUpdateError = (rawMessage: unknown) => {
       const message = typeof rawMessage === 'string' ? rawMessage : ''
       resetDownloadState()
 
-      const errorMessage = message || t('about.notifications.unknownErrorFallback')
-      toast.error(t('about.notifications.updateError', { error: errorMessage }))
+      const errorMessage = message || i18n.t('about.notifications.unknownErrorFallback')
+      toast.error(i18n.t('about.notifications.updateError', { error: errorMessage }))
     }
 
     const handleDownloadProgress = (rawProgress: unknown) => {
@@ -153,83 +229,52 @@ function AppContent() {
       }
     }
 
-    const handleUpdateNotification = (rawPayload: unknown) => {
-      const payload = (rawPayload ?? {}) as { body?: string; version?: string }
-      const versionLabel = payload.version ?? ''
-      const downloadedMessage = versionLabel
-        ? t('about.notifications.updateDownloadedVersion', { version: versionLabel })
-        : t('about.notifications.updateDownloaded')
-
-      toast.info(payload?.body ?? downloadedMessage, {
-        action: {
-          label: t('about.notifications.restartNowAction'),
-          onClick: () => {
-            void ipcServices.update.quitAndInstall()
-          }
-        }
-      })
-    }
-
     // Only listen to update events that should be shown globally
-    // update:available is handled in About page only
+    // update:available shows a visual indicator in the sidebar
+    ipcEvents.on('update:available', handleUpdateAvailable)
     ipcEvents.on('update:downloaded', handleUpdateDownloaded)
     ipcEvents.on('update:error', handleUpdateError)
     ipcEvents.on('update:download-progress', handleDownloadProgress)
-    ipcEvents.on('update:show-notification', handleUpdateNotification)
 
     return () => {
+      ipcEvents.removeListener('update:available', handleUpdateAvailable)
       ipcEvents.removeListener('update:downloaded', handleUpdateDownloaded)
       ipcEvents.removeListener('update:error', handleUpdateError)
       ipcEvents.removeListener('update:download-progress', handleDownloadProgress)
-      ipcEvents.removeListener('update:show-notification', handleUpdateNotification)
     }
-  }, [t])
-
-  const renderPage = () => {
-    switch (currentPage) {
-      case 'home':
-        return (
-          <Home
-            onOpenSupportedSites={() => setCurrentPage('sites')}
-            onOpenSettings={() => setCurrentPage('settings')}
-          />
-        )
-      case 'settings':
-        return <Settings />
-      case 'subscriptions':
-        return <Subscriptions />
-      case 'about':
-        return <About />
-      case 'sites':
-        return <SupportedSites />
-      default:
-        return (
-          <Home
-            onOpenSupportedSites={() => setCurrentPage('sites')}
-            onOpenSettings={() => setCurrentPage('settings')}
-          />
-        )
-    }
-  }
+  }, [i18n, setUpdateAvailable, setUpdateReady])
 
   return (
     <div className="flex flex-row h-screen">
       {/* Sidebar Navigation */}
-      <Sidebar currentPage={currentPage} onPageChange={setCurrentPage} />
+      <Sidebar
+        currentPage={currentPage}
+        onPageChange={handlePageChange}
+        onOpenSupportedSites={handleOpenSupportedSites}
+      />
 
       {/* Main Content */}
       <main className="flex flex-col flex-1 min-h-0 overflow-hidden bg-background">
         {/* Custom Title Bar */}
         <TitleBar platform={platform} />
 
-        <ScrollArea
-          className="flex-1 w-full overflow-y-auto overflow-x-hidden"
-          style={{ maxWidth: '100%' }}
-        >
-          <div className="w-full overflow-hidden" style={{ maxWidth: '100%' }}>
-            {renderPage()}
-          </div>
-        </ScrollArea>
+        <div className="flex-1 h-full overflow-y-auto overflow-x-hidden">
+          <Routes>
+            <Route
+              path="/"
+              element={
+                <Home
+                  onOpenSupportedSites={handleOpenSupportedSites}
+                  onOpenSettings={() => handlePageChange('settings')}
+                />
+              }
+            />
+            <Route path="/subscriptions" element={<Subscriptions />} />
+            <Route path="/settings" element={<Settings />} />
+            <Route path="/about" element={<About />} />
+            <Route path="*" element={<Navigate to="/" replace />} />
+          </Routes>
+        </div>
       </main>
 
       <Toaster richColors={true} />
@@ -239,9 +284,13 @@ function AppContent() {
 
 function App() {
   return (
-    <ThemeProvider attribute="class" defaultTheme="system" enableSystem>
-      <AppContent />
-    </ThemeProvider>
+    <ErrorBoundary>
+      <ThemeProvider attribute="class" defaultTheme="system" enableSystem>
+        <HashRouter>
+          <AppContent />
+        </HashRouter>
+      </ThemeProvider>
+    </ErrorBoundary>
   )
 }
 

src/renderer/src/assets/global.css

@@ -8,11 +8,16 @@
     @apply border-border;
   }
   body {
-    @apply text-foreground;
+    @apply text-foreground select-none;
+  }
+  input,
+  textarea,
+  [contenteditable='true'],
+  [contenteditable=''] {
+    @apply select-text;
   }
   input::placeholder,
   textarea::placeholder {
     opacity: 0.4;
   }
 }
-

src/renderer/src/assets/theme.css

@@ -34,7 +34,7 @@
   --font-sans: Open Sans, sans-serif;
   --font-serif: Georgia, serif;
   --font-mono: Menlo, monospace;
-  --radius: 1.3rem;
+  --radius: 0.625rem;
   --shadow-x: 0px;
   --shadow-y: 2px;
   --shadow-blur: 0px;
@@ -89,21 +89,6 @@
   --font-sans: Open Sans, sans-serif;
   --font-serif: Georgia, serif;
   --font-mono: Menlo, monospace;
-  --radius: 1.3rem;
-  --shadow-x: 0px;
-  --shadow-y: 2px;
-  --shadow-blur: 0px;
-  --shadow-spread: 0px;
-  --shadow-opacity: 0;
-  --shadow-color: #1da1f2;
-  --shadow-2xs: 0px 2px 0px 0px hsl(202.8169 89.1213% 53.1373% / 0.00);
-  --shadow-xs: 0px 2px 0px 0px hsl(202.8169 89.1213% 53.1373% / 0.00);
-  --shadow-sm: 0px 2px 0px 0px hsl(202.8169 89.1213% 53.1373% / 0.00), 0px 1px 2px -1px hsl(202.8169 89.1213% 53.1373% / 0.00);
-  --shadow: 0px 2px 0px 0px hsl(202.8169 89.1213% 53.1373% / 0.00), 0px 1px 2px -1px hsl(202.8169 89.1213% 53.1373% / 0.00);
-  --shadow-md: 0px 2px 0px 0px hsl(202.8169 89.1213% 53.1373% / 0.00), 0px 2px 4px -1px hsl(202.8169 89.1213% 53.1373% / 0.00);
-  --shadow-lg: 0px 2px 0px 0px hsl(202.8169 89.1213% 53.1373% / 0.00), 0px 4px 6px -1px hsl(202.8169 89.1213% 53.1373% / 0.00);
-  --shadow-xl: 0px 2px 0px 0px hsl(202.8169 89.1213% 53.1373% / 0.00), 0px 8px 10px -1px hsl(202.8169 89.1213% 53.1373% / 0.00);
-  --shadow-2xl: 0px 2px 0px 0px hsl(202.8169 89.1213% 53.1373% / 0.00);
 }
 
 @theme inline {
@@ -145,16 +130,10 @@
   --font-serif: var(--font-serif);
 
   --radius-sm: calc(var(--radius) - 4px);
-  --radius-md: calc(var(--radius) - 2px);
-  --radius-lg: var(--radius);
-  --radius-xl: calc(var(--radius) + 4px);
-
-  --shadow-2xs: var(--shadow-2xs);
-  --shadow-xs: var(--shadow-xs);
-  --shadow-sm: var(--shadow-sm);
-  --shadow: var(--shadow);
-  --shadow-md: var(--shadow-md);
-  --shadow-lg: var(--shadow-lg);
-  --shadow-xl: var(--shadow-xl);
-  --shadow-2xl: var(--shadow-2xl);
+--radius-md: calc(var(--radius) - 2px);
+--radius-lg: var(--radius);
+--radius-xl: calc(var(--radius) + 4px);
+--radius-2xl: calc(var(--radius) + 8px);
+--radius-3xl: calc(var(--radius) + 12px);
+--radius-4xl: calc(var(--radius) + 16px);
 }

src/renderer/src/components/download/DownloadItem.tsx

@@ -1,16 +1,27 @@
+import {
+  DOWNLOAD_FEEDBACK_ISSUE_TITLE,
+  FeedbackLinkButtons
+} from '@renderer/components/feedback/FeedbackLinks'
 import { Badge } from '@renderer/components/ui/badge'
 import { Button } from '@renderer/components/ui/button'
+import { Checkbox } from '@renderer/components/ui/checkbox'
 import { Progress } from '@renderer/components/ui/progress'
 import { RemoteImage } from '@renderer/components/ui/remote-image'
+import {
+  Sheet,
+  SheetContent,
+  SheetDescription,
+  SheetHeader,
+  SheetTitle
+} from '@renderer/components/ui/sheet'
 import { Tooltip, TooltipContent, TooltipTrigger } from '@renderer/components/ui/tooltip'
 import { useAtomValue, useSetAtom } from 'jotai'
 import {
   AlertCircle,
   CheckCircle2,
-  ChevronDown,
-  ChevronUp,
   Copy,
   FolderOpen,
+  Info,
   Loader2,
   Play,
   Trash2,
@@ -142,7 +153,7 @@ const getCodecLabel = (download: DownloadRecord): string | undefined => {
   if (!format) {
     return undefined
   }
-  if (download.type === 'audio' || download.type === 'extract') {
+  if (download.type === 'audio') {
     return sanitizeCodec(format.acodec)
   }
   return sanitizeCodec(format.vcodec) ?? sanitizeCodec(format.acodec)
@@ -150,6 +161,8 @@ const getCodecLabel = (download: DownloadRecord): string | undefined => {
 
 interface DownloadItemProps {
   download: DownloadRecord
+  isSelected?: boolean
+  onToggleSelect?: (id: string) => void
 }
 
 type MetadataDetail = {
@@ -184,7 +197,6 @@ const formatDateShort = (timestamp?: number) => {
   if (!timestamp) return ''
   const date = new Date(timestamp)
   return date.toLocaleString(undefined, {
-    year: 'numeric',
     month: 'numeric',
     day: 'numeric',
     hour: '2-digit',
@@ -192,7 +204,7 @@ const formatDateShort = (timestamp?: number) => {
   })
 }
 
-export function DownloadItem({ download }: DownloadItemProps) {
+export function DownloadItem({ download, isSelected = false, onToggleSelect }: DownloadItemProps) {
   const { t } = useTranslation()
   const settings = useAtomValue(settingsAtom)
   const removeDownload = useSetAtom(removeDownloadAtom)
@@ -201,18 +213,15 @@ export function DownloadItem({ download }: DownloadItemProps) {
   const isSubscriptionDownload = download.origin === 'subscription'
   const subscriptionLabel = download.subscriptionId ?? t('subscriptions.labels.unknown')
   const timestamp = download.completedAt ?? download.downloadedAt ?? download.createdAt
-  const showActionsWithoutHover = isHistory || download.status === 'completed'
-  const actionsContainerBaseClass =
-    'flex shrink-0 flex-wrap items-center justify-end gap-1 text-muted-foreground opacity-100 transition-opacity'
-  const actionsContainerClass = showActionsWithoutHover
-    ? actionsContainerBaseClass
-    : `${actionsContainerBaseClass} sm:opacity-0 sm:group-hover:opacity-100`
+  const actionsContainerClass =
+    'relative z-20 flex shrink-0 flex-wrap items-center justify-end gap-1 text-muted-foreground opacity-0 group-hover:opacity-100 transition-opacity'
   const resolvedExtension = resolveDownloadExtension(download)
   const normalizedSavedFileName = normalizeSavedFileName(download.savedFileName)
+  const selectionEnabled = isHistory && Boolean(onToggleSelect)
 
   // Track if the file exists
   const [fileExists, setFileExists] = useState(false)
-  const [detailsOpen, setDetailsOpen] = useState(false)
+  const [sheetOpen, setSheetOpen] = useState(false)
 
   // Check if file exists when download data changes
   useEffect(() => {
@@ -395,6 +404,10 @@ export function DownloadItem({ download }: DownloadItemProps) {
 
   const statusIcon = getStatusIcon()
   const statusText = getStatusText()
+  const progressInfo = download.progress
+  const showInlineProgress = Boolean(
+    progressInfo && download.status !== 'completed' && download.status !== 'error'
+  )
   const sourceDisplay =
     download.uploader && download.channel && download.uploader !== download.channel
       ? `${download.uploader} • ${download.channel}`
@@ -494,7 +507,7 @@ export function DownloadItem({ download }: DownloadItemProps) {
           href={download.url}
           target="_blank"
           rel="noopener noreferrer"
-          className="wrap-break-word text-primary hover:underline"
+          className="relative z-20 wrap-break-word text-primary hover:underline"
         >
           {download.url}
         </a>
@@ -638,130 +651,154 @@ export function DownloadItem({ download }: DownloadItemProps) {
 
   const hasMetadataDetails = metadataDetails.length > 0
 
+  const isSelectedHistory = selectionEnabled && isSelected
+
   return (
-    <div className="group relative w-full max-w-full overflow-hidden">
-      <div className="flex w-full flex-col gap-3 sm:flex-row sm:flex-wrap sm:items-start sm:gap-4">
+    <div
+      className={`px-6 py-2 group relative w-full max-w-full overflow-hidden transition-colors ${
+        isSelectedHistory ? 'bg-primary/10' : ''
+      }`}
+    >
+      <div
+        className={`flex w-full flex-col gap-2 sm:flex-row sm:gap-3 ${
+          selectionEnabled ? 'cursor-pointer' : ''
+        }`}
+        {...(selectionEnabled
+          ? {
+              onClick: () => onToggleSelect?.(download.id),
+              onKeyDown: (e: React.KeyboardEvent) => {
+                if (e.key === 'Enter' || e.key === ' ') {
+                  e.preventDefault()
+                  onToggleSelect?.(download.id)
+                }
+              },
+              role: 'button',
+              tabIndex: 0,
+              'aria-label': t('history.selectItem')
+            }
+          : {})}
+      >
         {/* Thumbnail */}
-        <div className="shrink-0 overflow-hidden rounded-md border border-border/60 bg-background/60 w-32 h-20">
+        <div className="relative z-20 shrink-0 overflow-hidden rounded-lg border border-border/60 bg-background/60 h-14 aspect-video pointer-events-none">
+          {selectionEnabled && (
+            <div
+              className={`absolute left-1 top-1 z-30 rounded-md transition pointer-events-auto ${
+                isSelected
+                  ? 'opacity-100'
+                  : 'opacity-0 group-hover:opacity-100 group-focus-within:opacity-100'
+              }`}
+            >
+              <Checkbox
+                checked={Boolean(isSelected)}
+                onCheckedChange={() => onToggleSelect?.(download.id)}
+                onClick={(event) => event.stopPropagation()}
+                aria-label={t('history.selectItem')}
+              />
+            </div>
+          )}
           <RemoteImage
             src={download.thumbnail}
             alt={download.title}
             className="w-full h-full object-cover"
-            fallbackIcon={<Play className="h-6 w-6" />}
+            fallbackIcon={<Play className="h-4 w-4" />}
           />
         </div>
 
         {/* Content */}
-        <div className="flex-1 min-w-0 max-w-full space-y-3 overflow-hidden">
-          <div className="flex w-full flex-col gap-3 sm:flex-row sm:flex-wrap sm:items-start sm:justify-between sm:gap-4">
-            <div className="flex-1 min-w-0 max-w-full space-y-2 overflow-hidden">
-              <div className="w-full min-w-0 overflow-hidden flex flex-wrap items-center gap-2">
-                <p className="flex-1 wrap-break-word text-sm font-medium sm:text-base line-clamp-2">
+        <div className="flex-1 min-w-0 max-w-full overflow-hidden pointer-events-none">
+          <div className="flex items-center justify-center h-14 w-full flex-col gap-1.5 sm:flex-row sm:justify-between sm:gap-2">
+            <div className="flex-1 items-center min-w-0 max-w-full space-y-1.5 overflow-hidden">
+              <div className="w-full min-w-0 overflow-hidden flex flex-wrap items-center gap-1.5">
+                <p className="flex-1 wrap-break-word text-sm font-medium line-clamp-1">
                   {download.title}
                 </p>
+                {download.type === 'audio' && (
+                  <Badge variant="secondary" className="text-[10px] px-1.5 py-0.5 shrink-0">
+                    {t('download.audio')}
+                  </Badge>
+                )}
                 {isSubscriptionDownload && (
                   <Badge variant="secondary" className="text-[10px] px-1.5 py-0.5 shrink-0">
                     {t('subscriptions.labels.subscription')}
                   </Badge>
                 )}
               </div>
-              <div className="flex w-full flex-wrap items-center gap-2 text-xs text-muted-foreground">
-                {(statusIcon || statusText) && (
-                  <div className="flex items-center gap-1 text-xs text-muted-foreground">
-                    {statusIcon}
-                    <span>{statusText}</span>
-                  </div>
-                )}
-                {timestamp ? (
-                  <span className="truncate text-muted-foreground/80">
-                    {formatDateShort(timestamp)}
-                  </span>
-                ) : null}
-              </div>
-              <div className="flex w-full flex-wrap items-center gap-2 text-[11px] text-muted-foreground">
-                {/* Source link */}
-                {(sourceDisplay || download.url) &&
-                  (download.url ? (
-                    <Tooltip>
-                      <TooltipTrigger asChild>
-                        <a
-                          href={download.url}
-                          target="_blank"
-                          rel="noopener noreferrer"
-                          className="max-w-[180px] truncate hover:text-primary transition-colors"
-                        >
-                          {sourceDisplay || download.url}
-                        </a>
-                      </TooltipTrigger>
-                      <TooltipContent className="max-w-xs wrap-break-word">
-                        <p>{download.url}</p>
-                      </TooltipContent>
-                    </Tooltip>
-                  ) : (
-                    <span className="truncate">{sourceDisplay}</span>
-                  ))}
-
-                {/* Playlist info */}
-                {download.playlistId && (
-                  <>
-                    <Badge variant="secondary" className="text-[10px] px-1.5 py-0.5 shrink-0">
-                      {t('playlist.badgeLabel')}
-                    </Badge>
-                    <span className="max-w-[200px] truncate">
-                      {download.playlistTitle || t('playlist.untitled')}
-                      {download.playlistIndex !== undefined &&
-                        download.playlistSize !== undefined &&
-                        ` (${download.playlistIndex}/${download.playlistSize})`}
-                    </span>
-                  </>
-                )}
-
-                {/* Quality badge */}
-                {qualityLabel && (
-                  <Badge variant="outline" className="text-[10px] px-1.5 py-0.5 shrink-0">
-                    {qualityLabel}
-                  </Badge>
-                )}
-
-                {/* File size */}
-                {inlineFileSize && <span>{inlineFileSize}</span>}
-
-                {/* Details toggle */}
-                {hasMetadataDetails && (
+              <div className="flex w-full flex-wrap items-center gap-1.5 text-[11px] text-muted-foreground">
+                {/* Status */}
+                {statusIcon && (
                   <Tooltip>
                     <TooltipTrigger asChild>
-                      <Button
-                        variant={detailsOpen ? 'default' : 'ghost'}
-                        size="icon"
-                        className="h-6 w-6 shrink-0"
-                        type="button"
-                        onClick={() => setDetailsOpen((prev) => !prev)}
-                      >
-                        {detailsOpen ? (
-                          <ChevronUp className="h-3.5 w-3.5" />
-                        ) : (
-                          <ChevronDown className="h-3.5 w-3.5" />
-                        )}
-                      </Button>
+                      <div className="flex items-center shrink-0">{statusIcon}</div>
                     </TooltipTrigger>
                     <TooltipContent>
-                      <p>{detailsOpen ? t('download.hideDetails') : t('download.showDetails')}</p>
+                      <p>{statusText}</p>
                     </TooltipContent>
                   </Tooltip>
                 )}
+                {showInlineProgress && (
+                  <div className="flex items-center gap-2 min-w-0">
+                    <span className="font-medium shrink-0">
+                      {(progressInfo?.percent ?? 0).toFixed(1)}%
+                    </span>
+                    {progressInfo?.downloaded && progressInfo?.total && (
+                      <span className="truncate max-w-[120px]">
+                        {progressInfo.downloaded} / {progressInfo.total}
+                      </span>
+                    )}
+                    {progressInfo?.currentSpeed && (
+                      <span className="truncate max-w-[80px]">{progressInfo.currentSpeed}</span>
+                    )}
+                    {progressInfo?.eta && (
+                      <span className="truncate max-w-[80px]">ETA: {progressInfo.eta}</span>
+                    )}
+                  </div>
+                )}
+                {/* Timestamp */}
+                {timestamp && (
+                  <span className="truncate shrink-0">{formatDateShort(timestamp)}</span>
+                )}
+                {/* Quality */}
+                {qualityLabel && (
+                  <>
+                    {(statusIcon || timestamp) && (
+                      <span className="text-muted-foreground/60 shrink-0">•</span>
+                    )}
+                    <span className="shrink-0">{qualityLabel}</span>
+                  </>
+                )}
+                {/* File size */}
+                {inlineFileSize && (
+                  <>
+                    {(statusIcon || timestamp || qualityLabel) && (
+                      <span className="text-muted-foreground/60 shrink-0">•</span>
+                    )}
+                    <span className="shrink-0">{inlineFileSize}</span>
+                  </>
+                )}
               </div>
-              {detailsOpen && hasMetadataDetails && (
-                <div className="space-y-2 rounded-md border border-dashed border-border/60 bg-muted/30 p-3 text-xs">
-                  {metadataDetails.map((item, index) => (
-                    <div key={`${item.label}-${index}`} className="flex gap-3">
-                      <span className="w-24 shrink-0 text-muted-foreground">{item.label}</span>
-                      <span className="flex-1 wrap-break-word text-foreground">{item.value}</span>
-                    </div>
-                  ))}
-                </div>
-              )}
             </div>
-            <div className={actionsContainerClass}>
+            <div className={`${actionsContainerClass} pointer-events-auto`}>
+              {/* Info button - show details in sheet */}
+              {hasMetadataDetails && (
+                <Tooltip>
+                  <TooltipTrigger asChild>
+                    <Button
+                      variant="ghost"
+                      size="icon"
+                      className="h-8 w-8 shrink-0 rounded-full"
+                      onClick={(e) => {
+                        e.stopPropagation()
+                        setSheetOpen(true)
+                      }}
+                    >
+                      <Info className="h-4 w-4" />
+                    </Button>
+                  </TooltipTrigger>
+                  <TooltipContent>
+                    <p>{t('download.showDetails')}</p>
+                  </TooltipContent>
+                </Tooltip>
+              )}
               {isHistory ? (
                 <>
                   {download.status === 'completed' && (
@@ -771,8 +808,11 @@ export function DownloadItem({ download }: DownloadItemProps) {
                           <Button
                             variant="ghost"
                             size="icon"
-                            className="h-8 w-8 shrink-0"
-                            onClick={handleCopyToClipboard}
+                            className="h-8 w-8 shrink-0 rounded-full"
+                            onClick={(e) => {
+                              e.stopPropagation()
+                              handleCopyToClipboard()
+                            }}
                             disabled={!canCopyToClipboard()}
                           >
                             <Copy className="h-4 w-4" />
@@ -787,8 +827,11 @@ export function DownloadItem({ download }: DownloadItemProps) {
                           <Button
                             variant="ghost"
                             size="icon"
-                            className="h-8 w-8 shrink-0"
-                            onClick={handleOpenFolder}
+                            className="h-8 w-8 shrink-0 rounded-full"
+                            onClick={(e) => {
+                              e.stopPropagation()
+                              handleOpenFolder()
+                            }}
                           >
                             <FolderOpen className="h-4 w-4" />
                           </Button>
@@ -804,8 +847,11 @@ export function DownloadItem({ download }: DownloadItemProps) {
                       <Button
                         variant="ghost"
                         size="icon"
-                        className="h-8 w-8 shrink-0"
-                        onClick={handleRemoveHistory}
+                        className="h-8 w-8 shrink-0 rounded-full"
+                        onClick={(e) => {
+                          e.stopPropagation()
+                          handleRemoveHistory()
+                        }}
                       >
                         <Trash2 className="h-4 w-4" />
                       </Button>
@@ -824,8 +870,11 @@ export function DownloadItem({ download }: DownloadItemProps) {
                           <Button
                             variant="ghost"
                             size="icon"
-                            className="h-8 w-8 shrink-0"
-                            onClick={handleCopyToClipboard}
+                            className="h-8 w-8 shrink-0 rounded-full"
+                            onClick={(e) => {
+                              e.stopPropagation()
+                              handleCopyToClipboard()
+                            }}
                             disabled={!canCopyToClipboard()}
                           >
                             <Copy className="h-4 w-4" />
@@ -840,8 +889,11 @@ export function DownloadItem({ download }: DownloadItemProps) {
                           <Button
                             variant="ghost"
                             size="icon"
-                            className="h-8 w-8 shrink-0"
-                            onClick={handleOpenFolder}
+                            className="h-8 w-8 shrink-0 rounded-full"
+                            onClick={(e) => {
+                              e.stopPropagation()
+                              handleOpenFolder()
+                            }}
                           >
                             <FolderOpen className="h-4 w-4" />
                           </Button>
@@ -858,8 +910,11 @@ export function DownloadItem({ download }: DownloadItemProps) {
                     <Button
                       variant="ghost"
                       size="icon"
-                      className="h-8 w-8 shrink-0"
-                      onClick={handleCancel}
+                      className="h-8 w-8 shrink-0 rounded-full"
+                      onClick={(e) => {
+                        e.stopPropagation()
+                        handleCancel()
+                      }}
                     >
                       <X className="h-4 w-4" />
                     </Button>
@@ -871,37 +926,66 @@ export function DownloadItem({ download }: DownloadItemProps) {
 
           {/* Progress */}
           {download.progress && download.status !== 'completed' && download.status !== 'error' && (
-            <div className="space-y-2 bg-background/60 w-full overflow-hidden">
-              <Progress value={download.progress.percent} className="h-1.5 w-full" />
-              <div className="flex flex-wrap items-center justify-between gap-2 text-xs text-muted-foreground w-full">
-                <span className="font-medium shrink-0">
-                  {download.progress.percent.toFixed(1)}%
-                </span>
-                <div className="flex flex-wrap items-center gap-3 min-w-0 flex-1">
-                  {download.progress.downloaded && download.progress.total && (
-                    <span className="truncate max-w-[100px]">
-                      {download.progress.downloaded} / {download.progress.total}
-                    </span>
-                  )}
-                  {download.progress.currentSpeed && (
-                    <span className="truncate max-w-[80px]">{download.progress.currentSpeed}</span>
-                  )}
-                  {download.progress.eta && (
-                    <span className="truncate max-w-[80px]">ETA: {download.progress.eta}</span>
-                  )}
-                </div>
-              </div>
+            <div className="bg-background/60 w-full overflow-hidden">
+              <Progress value={download.progress.percent} className="h-1 w-full" />
             </div>
           )}
 
           {/* Error message */}
           {download.status === 'error' && download.error && (
-            <p className="text-xs text-destructive line-clamp-2 w-full overflow-hidden">
-              {download.error}
-            </p>
+            <div className="flex flex-col gap-2">
+              <p className="text-xs text-destructive line-clamp-2 w-full overflow-hidden">
+                {download.error}
+              </p>
+              <div className="flex flex-wrap items-center gap-2 text-xs text-muted-foreground pointer-events-auto">
+                <span className="text-xs font-medium text-muted-foreground">
+                  {t('download.feedback.title')}
+                </span>
+                <div className="flex flex-wrap gap-2">
+                  <FeedbackLinkButtons
+                    error={download.error}
+                    sourceUrl={download.url}
+                    issueTitle={DOWNLOAD_FEEDBACK_ISSUE_TITLE}
+                    includeAppInfo
+                    ytDlpCommand={download.ytDlpCommand}
+                    buttonVariant="outline"
+                    buttonSize="sm"
+                    buttonClassName="h-6 gap-1 px-1.5 text-[10px]"
+                    iconClassName="h-3 w-3"
+                    onLinkClick={(event) => event.stopPropagation()}
+                  />
+                </div>
+              </div>
+            </div>
           )}
         </div>
       </div>
+
+      {/* Video Details Sheet */}
+      {hasMetadataDetails && (
+        <Sheet open={sheetOpen} onOpenChange={setSheetOpen}>
+          <SheetContent side="right" className="w-full sm:max-w-lg flex flex-col p-0">
+            <div className="flex flex-col h-full overflow-hidden">
+              <SheetHeader className="px-6 pt-6 pb-4 border-b shrink-0">
+                <SheetTitle className="line-clamp-2">{download.title}</SheetTitle>
+                <SheetDescription>{t('download.videoInfo')}</SheetDescription>
+              </SheetHeader>
+              <div className="flex-1 overflow-y-auto px-6 py-4">
+                <div className="space-y-4">
+                  {metadataDetails.map((item, index) => (
+                    <div key={`${item.label}-${index}`} className="flex flex-col gap-1">
+                      <span className="text-sm font-medium text-muted-foreground">
+                        {item.label}
+                      </span>
+                      <div className="text-sm text-foreground break-words">{item.value}</div>
+                    </div>
+                  ))}
+                </div>
+              </div>
+            </div>
+          </SheetContent>
+        </Sheet>
+      )}
     </div>
   )
 }

src/renderer/src/components/download/PlaylistDownload.tsx

@@ -0,0 +1,248 @@
+import { Checkbox } from '@renderer/components/ui/checkbox'
+import { Input } from '@renderer/components/ui/input'
+import { Label } from '@renderer/components/ui/label'
+import { ScrollArea } from '@renderer/components/ui/scroll-area'
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue
+} from '@renderer/components/ui/select'
+import { cn } from '@renderer/lib/utils'
+import type { PlaylistInfo } from '@shared/types'
+import { AlertCircle, List, Loader2 } from 'lucide-react'
+import type { Dispatch, SetStateAction } from 'react'
+import { useTranslation } from 'react-i18next'
+
+interface PlaylistDownloadProps {
+  playlistPreviewLoading: boolean
+  playlistPreviewError: string | null
+  playlistInfo: PlaylistInfo | null
+  playlistBusy: boolean
+  selectedPlaylistEntries: PlaylistInfo['entries']
+  selectedEntryIds: Set<string>
+  downloadType: 'video' | 'audio'
+  downloadTypeId: string
+  startIndex: string
+  endIndex: string
+  advancedOptionsOpen: boolean
+  setSelectedEntryIds: Dispatch<SetStateAction<Set<string>>>
+  setStartIndex: Dispatch<SetStateAction<string>>
+  setEndIndex: Dispatch<SetStateAction<string>>
+  setDownloadType: Dispatch<SetStateAction<'video' | 'audio'>>
+}
+
+export function PlaylistDownload({
+  playlistPreviewLoading,
+  playlistPreviewError,
+  playlistInfo,
+  playlistBusy,
+  selectedPlaylistEntries,
+  selectedEntryIds,
+  downloadType,
+  downloadTypeId,
+  startIndex,
+  endIndex,
+  advancedOptionsOpen,
+  setSelectedEntryIds,
+  setStartIndex,
+  setEndIndex,
+  setDownloadType
+}: PlaylistDownloadProps) {
+  const { t } = useTranslation()
+
+  return (
+    <>
+      {playlistPreviewLoading && !playlistPreviewError && (
+        <div className="flex-1 flex flex-col items-center justify-center gap-3 min-h-[200px]">
+          <Loader2 className="h-8 w-8 animate-spin text-primary" />
+          <p className="text-sm text-muted-foreground">{t('playlist.fetchingInfo')}</p>
+        </div>
+      )}
+
+      {playlistPreviewError && (
+        <div className="rounded-md border border-destructive/30 bg-destructive/5 p-3 mb-3">
+          <div className="flex items-start gap-2">
+            <AlertCircle className="h-4 w-4 text-destructive shrink-0 mt-0.5" />
+            <div className="flex-1 space-y-1">
+              <p className="text-sm font-medium text-destructive">{t('playlist.previewFailed')}</p>
+              <p className="text-xs text-muted-foreground/80">{playlistPreviewError}</p>
+            </div>
+          </div>
+        </div>
+      )}
+
+      {playlistInfo && !playlistPreviewLoading && (
+        <div className="flex-1 flex flex-col min-h-0 gap-3">
+          <div className="space-y-0.5 shrink-0">
+            <h3 className="font-bold text-sm leading-tight line-clamp-1">{playlistInfo.title}</h3>
+            <div className="flex items-center gap-1.5 text-xs text-muted-foreground">
+              <List className="h-3 w-3" />
+              <span>{t('playlist.foundVideos', { count: playlistInfo.entryCount })}</span>
+              {selectedPlaylistEntries.length !== playlistInfo.entryCount && (
+                <>
+                  <span>•</span>
+                  <span className="text-primary font-medium">
+                    {t('playlist.selectedVideos', { count: selectedPlaylistEntries.length })}
+                  </span>
+                </>
+              )}
+            </div>
+          </div>
+
+          <ScrollArea className="flex-1 w-full rounded-md border max-h-[45vh]">
+            <div className="p-1">
+              {playlistInfo.entries.map((entry) => {
+                const isSelected = selectedEntryIds.has(entry.id)
+                const isInRange =
+                  selectedEntryIds.size === 0 &&
+                  selectedPlaylistEntries.some((playlistEntry) => playlistEntry.id === entry.id)
+
+                const handleToggle = () => {
+                  setSelectedEntryIds((prev) => {
+                    const next = new Set(prev)
+                    if (next.has(entry.id)) {
+                      next.delete(entry.id)
+                    } else {
+                      next.add(entry.id)
+                    }
+                    return next
+                  })
+                  if (selectedEntryIds.size === 0) {
+                    setStartIndex('1')
+                    setEndIndex('')
+                  }
+                }
+
+                return (
+                  <button
+                    key={entry.id}
+                    type="button"
+                    className={cn(
+                      'flex items-center gap-3 px-2.5 py-1.5 rounded transition-colors cursor-pointer w-full text-left',
+                      isSelected || isInRange ? 'bg-primary/10' : 'hover:bg-muted/50'
+                    )}
+                    onClick={handleToggle}
+                    onKeyDown={(event) => {
+                      if (event.key === 'Enter' || event.key === ' ') {
+                        event.preventDefault()
+                        handleToggle()
+                      }
+                    }}
+                    aria-label={t('playlist.selectEntry', { index: entry.index })}
+                  >
+                    <Checkbox
+                      checked={isSelected || isInRange}
+                      onCheckedChange={(checked) => {
+                        setSelectedEntryIds((prev) => {
+                          const next = new Set(prev)
+                          if (checked) {
+                            next.add(entry.id)
+                          } else {
+                            next.delete(entry.id)
+                          }
+                          return next
+                        })
+                        if (selectedEntryIds.size === 0) {
+                          setStartIndex('1')
+                          setEndIndex('')
+                        }
+                      }}
+                      onClick={(event) => event.stopPropagation()}
+                      className="shrink-0"
+                    />
+                    <div className="shrink-0 w-8 text-xs font-medium text-muted-foreground/70 tabular-nums">
+                      #{entry.index}
+                    </div>
+                    <div className="flex-1 min-w-0">
+                      <p className="text-xs font-medium line-clamp-1 leading-tight">
+                        {entry.title || t('download.fetchingVideoInfo')}
+                      </p>
+                    </div>
+                  </button>
+                )
+              })}
+            </div>
+          </ScrollArea>
+
+          <div
+            data-state={advancedOptionsOpen ? 'open' : 'closed'}
+            className={cn(
+              'grid overflow-hidden transition-all duration-300 ease-out shrink-0',
+              advancedOptionsOpen ? 'grid-rows-[1fr] py-3 opacity-100' : 'grid-rows-[0fr] opacity-0'
+            )}
+            aria-hidden={!advancedOptionsOpen}
+          >
+            <div className={cn('min-h-0', !advancedOptionsOpen && 'pointer-events-none')}>
+              <div className="w-full pt-3 border-t">
+                <div className="space-y-3">
+                  <div className="grid grid-cols-2 gap-3">
+                    <div className="space-y-1.5">
+                      <Label
+                        htmlFor={downloadTypeId}
+                        className="text-xs font-medium text-muted-foreground"
+                      >
+                        {t('playlist.downloadType')}
+                      </Label>
+                      <Select
+                        value={downloadType}
+                        onValueChange={(value) => setDownloadType(value as 'video' | 'audio')}
+                        disabled={playlistBusy}
+                      >
+                        <SelectTrigger id={downloadTypeId} className="h-8 text-xs">
+                          <SelectValue />
+                        </SelectTrigger>
+                        <SelectContent>
+                          <SelectItem value="video" className="text-xs">
+                            {t('download.video')}
+                          </SelectItem>
+                          <SelectItem value="audio" className="text-xs">
+                            {t('download.audio')}
+                          </SelectItem>
+                        </SelectContent>
+                      </Select>
+                    </div>
+
+                    <div className="space-y-1.5">
+                      <Label className="text-xs font-medium text-muted-foreground">
+                        {t('playlist.range')}
+                      </Label>
+                      <div className="flex items-center gap-2">
+                        <Input
+                          placeholder="1"
+                          value={startIndex}
+                          onChange={(event) => {
+                            setStartIndex(event.target.value)
+                            if (selectedEntryIds.size > 0) {
+                              setSelectedEntryIds(new Set())
+                            }
+                          }}
+                          className="text-center h-8 text-xs"
+                          disabled={playlistBusy}
+                        />
+                        <span className="text-muted-foreground text-xs">-</span>
+                        <Input
+                          placeholder={playlistInfo?.entryCount.toString() || 'End'}
+                          value={endIndex}
+                          onChange={(event) => {
+                            setEndIndex(event.target.value)
+                            if (selectedEntryIds.size > 0) {
+                              setSelectedEntryIds(new Set())
+                            }
+                          }}
+                          className="text-center h-8 text-xs"
+                          disabled={playlistBusy}
+                        />
+                      </div>
+                    </div>
+                  </div>
+                </div>
+              </div>
+            </div>
+          </div>
+        </div>
+      )}
+    </>
+  )
+}

src/renderer/src/components/download/PlaylistDownloadGroup.tsx

@@ -1,5 +1,9 @@
+import { ChevronDown, ChevronRight, Trash2 } from 'lucide-react'
+import { useEffect, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import type { DownloadRecord } from '../../store/downloads'
+import { Button } from '../ui/button'
+import { Progress } from '../ui/progress'
 import { DownloadItem } from './DownloadItem'
 
 interface PlaylistDownloadGroupProps {
@@ -7,15 +11,50 @@ interface PlaylistDownloadGroupProps {
   title: string
   records: DownloadRecord[]
   totalCount: number
+  selectedIds?: Set<string>
+  onToggleSelect?: (id: string) => void
+  onDeletePlaylist?: (playlistId: string, title: string, ids: string[]) => void
+}
+
+const STORAGE_KEY_PREFIX = 'playlist_expanded_'
+
+const getStorageKey = (groupId: string): string => {
+  return `${STORAGE_KEY_PREFIX}${groupId}`
+}
+
+const loadExpandedState = (groupId: string): boolean => {
+  try {
+    const stored = localStorage.getItem(getStorageKey(groupId))
+    return stored === 'true'
+  } catch (error) {
+    console.error('Failed to load playlist expanded state:', error)
+    return false
+  }
+}
+
+const saveExpandedState = (groupId: string, isExpanded: boolean): void => {
+  try {
+    localStorage.setItem(getStorageKey(groupId), String(isExpanded))
+  } catch (error) {
+    console.error('Failed to save playlist expanded state:', error)
+  }
 }
 
 export function PlaylistDownloadGroup({
   groupId,
   title,
   records,
-  totalCount
+  totalCount,
+  selectedIds,
+  onToggleSelect,
+  onDeletePlaylist
 }: PlaylistDownloadGroupProps) {
   const { t } = useTranslation()
+  const [isExpanded, setIsExpanded] = useState(() => loadExpandedState(groupId))
+
+  useEffect(() => {
+    saveExpandedState(groupId, isExpanded)
+  }, [groupId, isExpanded])
 
   const completedCount = records.filter((record) => record.status === 'completed').length
   const errorCount = records.filter((record) => record.status === 'error').length
@@ -24,35 +63,106 @@ export function PlaylistDownloadGroup({
   ).length
 
   const displayTitle = title || t('playlist.untitled')
+  const historyRecords = records.filter((record) => record.entryType === 'history')
+  const canDeletePlaylist = historyRecords.length > 0 && Boolean(onDeletePlaylist)
+  const toggleLabel = isExpanded ? t('playlist.groupCollapse') : t('playlist.groupExpand')
+  const totalProgress = records.reduce((acc, record) => {
+    if (record.status === 'completed') {
+      return acc + 1
+    }
+    if (record.progress?.percent && record.progress.percent > 0) {
+      return acc + Math.min(record.progress.percent, 100) / 100
+    }
+    return acc
+  }, 0)
+  const aggregatePercent = totalCount > 0 ? Math.min((totalProgress / totalCount) * 100, 100) : 0
 
   return (
-    <div className="space-y-2 rounded-md border border-border/60 bg-muted/20 p-3">
-      <div className="flex flex-wrap items-center justify-between gap-3">
-        <div className="min-w-0">
-          <p className="truncate text-sm font-semibold text-foreground">{displayTitle}</p>
-          <p className="text-xs text-muted-foreground">
-            {t('playlist.groupSummary', { completed: completedCount, total: totalCount })}
-          </p>
-        </div>
-        <div className="flex shrink-0 items-center gap-2 text-xs text-muted-foreground">
-          {activeCount > 0 && <span>{t('playlist.groupActive', { count: activeCount })}</span>}
-          {errorCount > 0 && (
-            <span className="text-destructive">
-              {t('playlist.groupErrors', { count: errorCount })}
-            </span>
+    <div className="rounded-md bg-muted/30 mx-6">
+      <div className="flex items-center justify-between gap-2">
+        <button
+          type="button"
+          className="px-3 flex min-w-0 flex-1 items-center gap-2 rounded-md p-1.5 transition-colors hover:bg-muted/40 active:bg-muted/60"
+          onClick={() => setIsExpanded((prev) => !prev)}
+          aria-expanded={isExpanded}
+          aria-label={toggleLabel}
+          title={toggleLabel}
+        >
+          <div className="flex shrink-0 items-center justify-center text-muted-foreground">
+            {isExpanded ? (
+              <ChevronDown className="h-5 w-5" />
+            ) : (
+              <ChevronRight className="h-5 w-5" />
+            )}
+          </div>
+          <div className="min-w-0 flex-1 text-left">
+            <p className="truncate text-sm font-medium text-foreground">{displayTitle}</p>
+            <div className="flex items-center gap-1.5 text-[11px] text-muted-foreground">
+              <span>
+                {t('playlist.collapsedProgress', { completed: completedCount, total: totalCount })}
+              </span>
+              {activeCount > 0 && (
+                <>
+                  <span className="text-muted-foreground/50">•</span>
+                  <span>{t('playlist.groupActive', { count: activeCount })}</span>
+                </>
+              )}
+              {errorCount > 0 && (
+                <>
+                  <span className="text-muted-foreground/50">•</span>
+                  <span className="text-destructive">
+                    {t('playlist.groupErrors', { count: errorCount })}
+                  </span>
+                </>
+              )}
+            </div>
+          </div>
+        </button>
+        <div className="flex shrink-0 items-center gap-1 pr-3">
+          {canDeletePlaylist && (
+            <Button
+              type="button"
+              variant="ghost"
+              size="icon"
+              className="h-6 w-6 rounded-full"
+              onClick={(e) => {
+                e.stopPropagation()
+                onDeletePlaylist?.(
+                  groupId,
+                  displayTitle,
+                  historyRecords.map((record) => record.id)
+                )
+              }}
+              aria-label={t('history.deletePlaylist')}
+              title={t('history.deletePlaylist')}
+            >
+              <Trash2 className="h-3.5 w-3.5" />
+            </Button>
           )}
         </div>
       </div>
 
-      <div className="space-y-2">
-        {records.map((record) => (
-          <div
-            key={`${groupId}:${record.entryType}:${record.id}`}
-            className="border-l border-border/50 pl-3"
-          >
-            <DownloadItem download={record} />
-          </div>
-        ))}
+      {!isExpanded && totalCount > 0 && (
+        <Progress value={aggregatePercent} className="h-0.5 w-full" />
+      )}
+
+      <div
+        className="grid overflow-hidden transition-[grid-template-rows] duration-300 ease-in-out"
+        style={{
+          gridTemplateRows: isExpanded ? '1fr' : '0fr'
+        }}
+      >
+        <div className="min-h-0">
+          {records.map((record) => (
+            <div key={`${groupId}:${record.entryType}:${record.id}`}>
+              <DownloadItem
+                download={record}
+                isSelected={selectedIds?.has(record.id) ?? false}
+                onToggleSelect={onToggleSelect}
+              />
+            </div>
+          ))}
+        </div>
       </div>
     </div>
   )

src/renderer/src/components/download/SingleVideoDownload.tsx

@@ -0,0 +1,753 @@
+import { Button } from '@renderer/components/ui/button'
+import { ImageWithPlaceholder } from '@renderer/components/ui/image-with-placeholder'
+import { Label } from '@renderer/components/ui/label'
+import { RadioGroup, RadioGroupItem } from '@renderer/components/ui/radio-group'
+import { ScrollArea } from '@renderer/components/ui/scroll-area'
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue
+} from '@renderer/components/ui/select'
+import { Separator } from '@renderer/components/ui/separator'
+import { cn } from '@renderer/lib/utils'
+import type { OneClickQualityPreset, VideoFormat, VideoInfo } from '@shared/types'
+import { useAtom } from 'jotai'
+import { AlertCircle, ExternalLink, Loader2, Settings2 } from 'lucide-react'
+import { useCallback, useEffect, useMemo, useState } from 'react'
+import { useTranslation } from 'react-i18next'
+import { useCachedThumbnail } from '../../hooks/use-cached-thumbnail'
+import { settingsAtom } from '../../store/settings'
+import { DOWNLOAD_FEEDBACK_ISSUE_TITLE, FeedbackLinkButtons } from '../feedback/FeedbackLinks'
+
+export interface SingleVideoState {
+  title: string
+  activeTab: 'video' | 'audio'
+  selectedVideoFormat: string
+  selectedAudioFormat: string
+  customDownloadPath: string
+  selectedContainer?: string
+  selectedCodec?: string
+  selectedFps?: string
+}
+
+interface SingleVideoDownloadProps {
+  loading: boolean
+  error: string | null
+  videoInfo: VideoInfo | null
+  state: SingleVideoState
+  feedbackSourceUrl?: string | null
+  ytDlpCommand?: string
+  onStateChange: (state: Partial<SingleVideoState>) => void
+}
+
+const qualityPresetToVideoHeight: Record<OneClickQualityPreset, number | null> = {
+  best: null,
+  good: 1080,
+  normal: 720,
+  bad: 480,
+  worst: 360
+}
+
+const formatDuration = (seconds?: number): string => {
+  if (!seconds) return '00:00'
+  const hours = Math.floor(seconds / 3600)
+  const minutes = Math.floor((seconds % 3600) / 60)
+  const remainingSeconds = Math.floor(seconds % 60)
+  if (hours > 0) {
+    return `${hours}:${minutes.toString().padStart(2, '0')}:${remainingSeconds
+      .toString()
+      .padStart(2, '0')}`
+  }
+  return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}`
+}
+
+const getCodecShortName = (codec?: string): string => {
+  if (!codec || codec === 'none') return 'Unknown'
+  return codec.split('.')[0].toUpperCase()
+}
+
+const filterFormatsByType = (
+  formats: VideoInfo['formats'],
+  activeTab: 'video' | 'audio'
+): VideoInfo['formats'] => {
+  if (!formats) return []
+
+  return formats.filter((format) => {
+    if (activeTab === 'video') {
+      return format.vcodec && format.vcodec !== 'none'
+    }
+
+    return (
+      format.acodec &&
+      format.acodec !== 'none' &&
+      (format.video_ext === 'none' ||
+        !format.video_ext ||
+        !format.vcodec ||
+        format.vcodec === 'none')
+    )
+  })
+}
+
+interface FormatListProps {
+  formats: VideoFormat[]
+  type: 'video' | 'audio'
+  codec?: string
+  selectedFormat: string
+  onFormatChange: (formatId: string) => void
+}
+
+const FormatList = ({ formats, type, codec, selectedFormat, onFormatChange }: FormatListProps) => {
+  const { t } = useTranslation()
+  const [settings] = useAtom(settingsAtom)
+  const [videoFormats, setVideoFormats] = useState<VideoFormat[]>([])
+  const [audioFormats, setAudioFormats] = useState<VideoFormat[]>([])
+
+  const getFileSize = useCallback((format: VideoFormat): number => {
+    return format.filesize ?? format.filesize_approx ?? 0
+  }, [])
+
+  const sortVideoFormatsByQuality = useCallback(
+    (a: VideoFormat, b: VideoFormat) => {
+      const aHeight = a.height ?? 0
+      const bHeight = b.height ?? 0
+      if (aHeight !== bHeight) {
+        return bHeight - aHeight
+      }
+      const aFps = a.fps ?? 0
+      const bFps = b.fps ?? 0
+      if (aFps !== bFps) {
+        return bFps - aFps
+      }
+      const aHasSize = !!(a.filesize || a.filesize_approx)
+      const bHasSize = !!(b.filesize || b.filesize_approx)
+      if (aHasSize !== bHasSize) {
+        return bHasSize ? 1 : -1
+      }
+      return getFileSize(b) - getFileSize(a)
+    },
+    [getFileSize]
+  )
+
+  const sortAudioFormatsByQuality = useCallback(
+    (a: VideoFormat, b: VideoFormat) => {
+      const aQuality = a.tbr ?? a.quality ?? 0
+      const bQuality = b.tbr ?? b.quality ?? 0
+      if (aQuality !== bQuality) {
+        return bQuality - aQuality
+      }
+      const aHasSize = !!(a.filesize || a.filesize_approx)
+      const bHasSize = !!(b.filesize || b.filesize_approx)
+      if (aHasSize !== bHasSize) {
+        return bHasSize ? 1 : -1
+      }
+      return getFileSize(b) - getFileSize(a)
+    },
+    [getFileSize]
+  )
+
+  const pickVideoFormatForPreset = useCallback(
+    (presetFormats: VideoFormat[], preset: OneClickQualityPreset): VideoFormat | null => {
+      if (presetFormats.length === 0) {
+        return null
+      }
+
+      const heightLimit = qualityPresetToVideoHeight[preset]
+      const sorted = [...presetFormats].sort(sortVideoFormatsByQuality)
+
+      if (preset === 'worst') {
+        return sorted[sorted.length - 1] ?? sorted[0]
+      }
+
+      if (!heightLimit) {
+        return sorted[0]
+      }
+
+      const matchingLimit = sorted.find((format) => {
+        if (!format.height) return false
+        return format.height <= heightLimit
+      })
+
+      return matchingLimit ?? sorted[0]
+    },
+    [sortVideoFormatsByQuality]
+  )
+
+  useEffect(() => {
+    const isVideoFormat = (format: VideoFormat) =>
+      format.video_ext !== 'none' && format.vcodec && format.vcodec !== 'none'
+    const isAudioFormat = (format: VideoFormat) =>
+      format.acodec &&
+      format.acodec !== 'none' &&
+      (format.video_ext === 'none' ||
+        !format.video_ext ||
+        !format.vcodec ||
+        format.vcodec === 'none')
+
+    const videos = formats.filter(isVideoFormat)
+    const audios = formats.filter(isAudioFormat)
+
+    const groupedByHeight = new Map<number, VideoFormat[]>()
+    videos.forEach((format) => {
+      const height = format.height ?? 0
+      const existing = groupedByHeight.get(height) || []
+      existing.push(format)
+      groupedByHeight.set(height, existing)
+    })
+
+    const finalVideos = Array.from(groupedByHeight.values()).map((group) => {
+      return group.sort((a, b) => getFileSize(b) - getFileSize(a))[0]
+    })
+
+    let finalAudios = audios
+
+    if (codec === 'auto' && type === 'audio') {
+      const groupedByQuality = new Map<string, VideoFormat[]>()
+      audios.forEach((format) => {
+        const qualityKey = format.tbr
+          ? `tbr_${format.tbr}`
+          : format.quality
+            ? `quality_${format.quality}`
+            : 'unknown'
+        const existing = groupedByQuality.get(qualityKey) || []
+        existing.push(format)
+        groupedByQuality.set(qualityKey, existing)
+      })
+
+      finalAudios = Array.from(groupedByQuality.values()).map((group) => {
+        return group.sort((a, b) => getFileSize(b) - getFileSize(a))[0]
+      })
+    }
+
+    finalVideos.sort(sortVideoFormatsByQuality)
+    finalAudios.sort(sortAudioFormatsByQuality)
+
+    setVideoFormats(finalVideos)
+    setAudioFormats(finalAudios)
+
+    if (type === 'video') {
+      const videosWithAudio = finalVideos.filter(
+        (format) => format.acodec && format.acodec !== 'none'
+      )
+      const autoVideos =
+        finalAudios.length > 0
+          ? finalVideos
+          : videosWithAudio.length > 0
+            ? videosWithAudio
+            : finalVideos
+
+      const hasSelectedVideo = finalVideos.some((format) => format.format_id === selectedFormat)
+      if (autoVideos.length > 0 && (!selectedFormat || !hasSelectedVideo)) {
+        const preferred = pickVideoFormatForPreset(autoVideos, settings.oneClickQuality)
+        if (preferred) {
+          onFormatChange(preferred.format_id)
+        }
+      }
+    } else {
+      const hasSelectedAudio = finalAudios.some((format) => format.format_id === selectedFormat)
+      if (finalAudios.length > 0 && (!selectedFormat || !hasSelectedAudio)) {
+        const best = finalAudios[0]
+        onFormatChange(best.format_id)
+      }
+    }
+  }, [
+    formats,
+    settings.oneClickQuality,
+    type,
+    selectedFormat,
+    onFormatChange,
+    pickVideoFormatForPreset,
+    codec,
+    getFileSize,
+    sortVideoFormatsByQuality,
+    sortAudioFormatsByQuality
+  ])
+
+  const formatSize = (bytes?: number) => {
+    if (!bytes) return t('download.unknownSize')
+    const mb = bytes / 1000000
+    return `${mb.toFixed(2)} MB`
+  }
+
+  const formatVideoQuality = (format: VideoFormat) => {
+    if (format.height) {
+      return `${format.height}p${format.fps === 60 ? '60' : ''}`
+    }
+    if (format.format_note) {
+      return format.format_note
+    }
+    if (typeof format.quality === 'number') {
+      return format.quality.toString()
+    }
+    return t('download.unknownQuality')
+  }
+
+  const formatAudioQuality = (format: VideoFormat) => {
+    if (format.tbr) {
+      return `${Math.round(format.tbr)} kbps`
+    }
+    if (format.format_note) {
+      return format.format_note
+    }
+    if (typeof format.quality === 'number') {
+      return format.quality.toString()
+    }
+    return t('download.unknownQuality')
+  }
+
+  const formatVideoDetail = (format: VideoFormat) => {
+    const parts: string[] = []
+    parts.push(format.ext.toUpperCase())
+    if (format.vcodec) {
+      parts.push(format.vcodec.split('.')[0].toUpperCase())
+    }
+    if (format.acodec && format.acodec !== 'none') {
+      parts.push(format.acodec.split('.')[0].toUpperCase())
+    }
+    return parts.join(' • ')
+  }
+
+  const formatAudioDetail = (format: VideoFormat) => {
+    const parts: string[] = []
+    const ext = format.ext === 'webm' ? 'opus' : format.ext
+    parts.push(ext.toUpperCase())
+    if (format.acodec) {
+      parts.push(format.acodec.split('.')[0].toUpperCase())
+    }
+    return parts.join(' • ')
+  }
+
+  const list = type === 'video' ? videoFormats : audioFormats
+
+  if (list.length === 0) {
+    return null
+  }
+
+  return (
+    <RadioGroup value={selectedFormat} onValueChange={onFormatChange} className="w-full gap-1">
+      {list.map((format) => {
+        const qualityLabel =
+          type === 'video' ? formatVideoQuality(format) : formatAudioQuality(format)
+        const detailLabel = type === 'video' ? formatVideoDetail(format) : formatAudioDetail(format)
+        const thirdColumnLabel =
+          type === 'video'
+            ? format.fps
+              ? `${format.fps}fps`
+              : ''
+            : format.acodec
+              ? format.acodec.split('.')[0].toUpperCase()
+              : ''
+        const sizeLabel = formatSize(format.filesize || format.filesize_approx)
+        const isSelected = selectedFormat === format.format_id
+
+        return (
+          <label
+            key={format.format_id}
+            htmlFor={`${type}-${format.format_id}`}
+            className={cn(
+              'relative flex items-center gap-3 px-3 py-2 cursor-pointer transition-colors rounded-md',
+              isSelected ? 'bg-primary/10' : 'hover:bg-muted'
+            )}
+          >
+            <RadioGroupItem
+              value={format.format_id}
+              id={`${type}-${format.format_id}`}
+              className="shrink-0 hidden"
+            />
+
+            <div className="flex-1 min-w-0 flex items-center gap-4">
+              <span
+                className={cn('text-sm font-medium w-16 shrink-0', isSelected && 'text-primary')}
+              >
+                {qualityLabel}
+              </span>
+
+              <div className="flex-1 flex items-center gap-2 min-w-0">
+                <span className="text-xs text-muted-foreground truncate">{detailLabel}</span>
+                {thirdColumnLabel && thirdColumnLabel !== '-' && (
+                  <span className="shrink-0 px-1.5 py-0.5 rounded bg-muted text-[10px] font-medium text-muted-foreground">
+                    {thirdColumnLabel}
+                  </span>
+                )}
+              </div>
+
+              <span className="text-xs text-muted-foreground tabular-nums shrink-0 w-20 text-right">
+                {sizeLabel}
+              </span>
+            </div>
+          </label>
+        )
+      })}
+    </RadioGroup>
+  )
+}
+
+export function SingleVideoDownload({
+  loading,
+  error,
+  videoInfo,
+  state,
+  feedbackSourceUrl,
+  ytDlpCommand,
+  onStateChange
+}: SingleVideoDownloadProps) {
+  const { t } = useTranslation()
+  const cachedThumbnail = useCachedThumbnail(videoInfo?.thumbnail)
+  const [showAdvanced, setShowAdvanced] = useState(false)
+
+  const { title, activeTab, selectedContainer, selectedCodec, selectedFps } = state
+  const displayTitle = title || videoInfo?.title || t('download.fetchingVideoInfo')
+
+  const relevantFormats = useMemo(() => {
+    if (!videoInfo?.formats) return []
+    return filterFormatsByType(videoInfo.formats, activeTab)
+  }, [videoInfo?.formats, activeTab])
+
+  const containers = useMemo(() => {
+    if (relevantFormats.length === 0) return []
+    const exts = new Set(relevantFormats.map((format) => format.ext))
+    return Array.from(exts).sort()
+  }, [relevantFormats])
+
+  useEffect(() => {
+    if (containers.length === 0) return undefined
+
+    if (selectedContainer && !containers.includes(selectedContainer)) {
+      let defaultContainer: string
+      if (activeTab === 'video') {
+        defaultContainer = containers.includes('mp4') ? 'mp4' : containers[0]
+      } else {
+        defaultContainer = containers.includes('m4a')
+          ? 'm4a'
+          : containers.includes('mp3')
+            ? 'mp3'
+            : containers[0]
+      }
+      const timer = setTimeout(() => {
+        onStateChange({ selectedContainer: defaultContainer, selectedCodec: 'auto' })
+      }, 0)
+      return () => clearTimeout(timer)
+    }
+
+    if (!selectedContainer) {
+      let defaultContainer: string
+      if (activeTab === 'video') {
+        defaultContainer = containers.includes('mp4') ? 'mp4' : containers[0]
+      } else {
+        defaultContainer = containers.includes('m4a')
+          ? 'm4a'
+          : containers.includes('mp3')
+            ? 'mp3'
+            : containers[0]
+      }
+      const timer = setTimeout(() => {
+        onStateChange({ selectedContainer: defaultContainer })
+      }, 0)
+      return () => clearTimeout(timer)
+    }
+
+    return undefined
+  }, [containers, selectedContainer, activeTab, onStateChange])
+
+  const formatsByContainer = useMemo(() => {
+    if (relevantFormats.length === 0) return []
+
+    if (!selectedContainer) {
+      return relevantFormats
+    }
+
+    return relevantFormats.filter((format) => format.ext === selectedContainer)
+  }, [relevantFormats, selectedContainer])
+
+  const codecs = useMemo(() => {
+    if (formatsByContainer.length === 0) return []
+
+    const SetVals = new Set<string>()
+    formatsByContainer.forEach((format) => {
+      if (activeTab === 'video') {
+        const c = format.vcodec
+        if (c && c !== 'none') {
+          SetVals.add(getCodecShortName(c))
+        }
+      } else {
+        const c = format.acodec
+        if (c && c !== 'none') {
+          SetVals.add(getCodecShortName(c))
+        }
+      }
+    })
+    return Array.from(SetVals).sort()
+  }, [formatsByContainer, activeTab])
+
+  useEffect(() => {
+    if (codecs.length === 0) return undefined
+    if (selectedCodec && selectedCodec !== 'auto' && !codecs.includes(selectedCodec)) {
+      const timer = setTimeout(() => {
+        onStateChange({ selectedCodec: 'auto' })
+      }, 0)
+      return () => clearTimeout(timer)
+    }
+    return undefined
+  }, [codecs, selectedCodec, onStateChange])
+
+  const formatsByCodec = useMemo(() => {
+    if (!selectedCodec || selectedCodec === 'auto') return formatsByContainer
+    return formatsByContainer.filter((format) => {
+      if (activeTab === 'video') {
+        const c = format.vcodec
+        return c && c !== 'none' && getCodecShortName(c) === selectedCodec
+      }
+      const c = format.acodec
+      return c && c !== 'none' && getCodecShortName(c) === selectedCodec
+    })
+  }, [formatsByContainer, selectedCodec, activeTab])
+
+  const framerates = useMemo(() => {
+    if (activeTab !== 'video') return []
+    const SetVals = new Set<number>()
+    formatsByCodec.forEach((format) => {
+      if (format.fps) SetVals.add(format.fps)
+    })
+    return Array.from(SetVals).sort((a, b) => b - a)
+  }, [formatsByCodec, activeTab])
+
+  const filteredFormats = useMemo(() => {
+    let res = formatsByCodec
+    if (activeTab === 'video' && selectedFps && selectedFps !== 'highest') {
+      res = res.filter((format) => format.fps === Number(selectedFps))
+    }
+    return res
+  }, [formatsByCodec, selectedFps, activeTab])
+
+  return (
+    <div className="flex flex-col flex-1 min-h-0">
+      {loading && !error && (
+        <div className="flex-1 flex flex-col items-center justify-center gap-3 min-h-[200px]">
+          <Loader2 className="h-8 w-8 animate-spin text-primary" />
+          <p className="text-sm text-muted-foreground">{t('download.fetchingVideoInfo')}</p>
+        </div>
+      )}
+
+      {error && (
+        <div className="shrink-0 mb-3 rounded-md border border-destructive/30 bg-destructive/5 p-3">
+          <div className="flex items-start gap-2">
+            <AlertCircle className="h-4 w-4 text-destructive shrink-0 mt-0.5" />
+            <div className="flex-1 space-y-1 min-w-0">
+              <p className="text-sm font-medium text-destructive">{t('errors.fetchInfoFailed')}</p>
+              <p className="text-xs text-muted-foreground/80 break-words">{error}</p>
+            </div>
+          </div>
+          <div className="mt-2.5 flex flex-wrap items-center gap-1.5">
+            <span className="text-[10px] font-medium text-muted-foreground/70">
+              {t('download.feedback.title')}
+            </span>
+            <div className="flex flex-wrap gap-1.5">
+              <FeedbackLinkButtons
+                error={error}
+                sourceUrl={feedbackSourceUrl}
+                issueTitle={DOWNLOAD_FEEDBACK_ISSUE_TITLE}
+                includeAppInfo
+                ytDlpCommand={ytDlpCommand}
+                buttonVariant="outline"
+                buttonSize="sm"
+                buttonClassName="h-5 gap-1 px-1.5 text-[10px]"
+                iconClassName="h-2.5 w-2.5"
+              />
+            </div>
+          </div>
+        </div>
+      )}
+
+      {!loading && videoInfo && (
+        <div className="flex-1 flex flex-col min-h-0">
+          <div className="flex gap-4 py-4 shrink-0">
+            <div className="shrink-0 w-32 relative rounded-md overflow-hidden bg-muted">
+              <ImageWithPlaceholder
+                src={cachedThumbnail}
+                alt={displayTitle}
+                className="w-full h-full object-cover aspect-video"
+              />
+              <div className="absolute bottom-1 right-1 bg-black/80 text-white text-[10px] px-1 rounded">
+                {formatDuration(videoInfo.duration)}
+              </div>
+            </div>
+
+            <div className="flex-1 min-w-0 flex flex-col justify-between py-0.5">
+              <div className="space-y-0.5">
+                <h3 className="font-bold text-[13px] leading-tight line-clamp-2">{displayTitle}</h3>
+                <div className="flex items-center gap-1.5 text-xs text-muted-foreground">
+                  {videoInfo.uploader && (
+                    <span className="truncate max-w-[140px] uppercase tracking-wider font-semibold opacity-70">
+                      {videoInfo.uploader}
+                    </span>
+                  )}
+                  {videoInfo.webpage_url && (
+                    <a
+                      href={videoInfo.webpage_url}
+                      target="_blank"
+                      rel="noreferrer"
+                      className="hover:text-primary transition-colors"
+                    >
+                      <ExternalLink className="h-3 w-3" />
+                    </a>
+                  )}
+                </div>
+              </div>
+
+              <div className="flex items-center justify-between">
+                <div className="flex p-0.5 bg-muted rounded-md gap-0.5">
+                  <Button
+                    variant={activeTab === 'video' ? 'secondary' : 'ghost'}
+                    size="sm"
+                    onClick={() => onStateChange({ activeTab: 'video' })}
+                    className={cn(
+                      'h-5 px-2 text-[11px] rounded-sm',
+                      activeTab === 'video'
+                        ? 'bg-background text-foreground'
+                        : 'text-muted-foreground/60'
+                    )}
+                  >
+                    {t('download.video')}
+                  </Button>
+                  <Button
+                    variant={activeTab === 'audio' ? 'secondary' : 'ghost'}
+                    size="sm"
+                    onClick={() => onStateChange({ activeTab: 'audio' })}
+                    className={cn(
+                      'h-5 px-2 text-[11px] rounded-sm',
+                      activeTab === 'audio'
+                        ? 'bg-background text-foreground'
+                        : 'text-muted-foreground/60'
+                    )}
+                  >
+                    {t('download.audio')}
+                  </Button>
+                </div>
+
+                <Button
+                  variant="ghost"
+                  size="sm"
+                  onClick={() => setShowAdvanced(!showAdvanced)}
+                  className={cn(
+                    'h-6 w-6 p-0 rounded-full hover:bg-muted font-normal text-muted-foreground transition-colors',
+                    showAdvanced && 'bg-muted text-foreground'
+                  )}
+                >
+                  <Settings2 className="h-4 w-4" />
+                </Button>
+              </div>
+            </div>
+          </div>
+
+          <Separator />
+
+          <div className="flex-1 flex flex-col min-h-0 overflow-hidden">
+            <div
+              className={cn(
+                'grid transition-all duration-300 ease-in-out',
+                showAdvanced ? 'grid-rows-[1fr] py-3 border-b' : 'grid-rows-[0fr]'
+              )}
+            >
+              <div className="overflow-hidden min-h-0">
+                <div className="flex flex-wrap items-end gap-3">
+                  <div className="space-y-1.5 flex-1 min-w-[120px]">
+                    <Label className="text-xs text-muted-foreground font-medium px-0.5">
+                      {t('download.container') || 'Format'}
+                    </Label>
+                    <Select
+                      value={selectedContainer || ''}
+                      onValueChange={(value) => onStateChange({ selectedContainer: value })}
+                      disabled={containers.length <= 1}
+                    >
+                      <SelectTrigger className="h-8 text-xs">
+                        <SelectValue placeholder="Container" />
+                      </SelectTrigger>
+                      <SelectContent>
+                        {containers.map((ext) => (
+                          <SelectItem key={ext} value={ext} className="text-xs">
+                            {ext.toUpperCase()}
+                          </SelectItem>
+                        ))}
+                      </SelectContent>
+                    </Select>
+                  </div>
+
+                  <div className="space-y-1.5 flex-1 min-w-[120px]">
+                    <Label className="text-xs text-muted-foreground font-medium px-0.5">
+                      Codec
+                    </Label>
+                    <Select
+                      value={selectedCodec || 'auto'}
+                      onValueChange={(value) => onStateChange({ selectedCodec: value })}
+                      disabled={codecs.length <= 1}
+                    >
+                      <SelectTrigger className="h-8 text-xs">
+                        <SelectValue placeholder="Auto" />
+                      </SelectTrigger>
+                      <SelectContent>
+                        <SelectItem value="auto" className="text-xs">
+                          Auto
+                        </SelectItem>
+                        {codecs.map((codecName) => (
+                          <SelectItem key={codecName} value={codecName} className="text-xs">
+                            {codecName}
+                          </SelectItem>
+                        ))}
+                      </SelectContent>
+                    </Select>
+                  </div>
+
+                  {activeTab === 'video' && (
+                    <div className="space-y-1.5 flex-1 min-w-[120px]">
+                      <Label className="text-xs text-muted-foreground font-medium px-0.5">
+                        Frame Rate
+                      </Label>
+                      <Select
+                        value={selectedFps || 'highest'}
+                        onValueChange={(value) => onStateChange({ selectedFps: value })}
+                        disabled={framerates.length === 0}
+                      >
+                        <SelectTrigger className="h-8 text-xs">
+                          <SelectValue placeholder="Highest" />
+                        </SelectTrigger>
+                        <SelectContent>
+                          <SelectItem value="highest" className="text-xs">
+                            Highest
+                          </SelectItem>
+                          {framerates.map((fps) => (
+                            <SelectItem key={fps} value={String(fps)} className="text-xs">
+                              {fps} fps
+                            </SelectItem>
+                          ))}
+                        </SelectContent>
+                      </Select>
+                    </div>
+                  )}
+                </div>
+              </div>
+            </div>
+
+            <ScrollArea className="flex-1 overflow-y-auto my-3 max-h-72">
+              <FormatList
+                formats={filteredFormats}
+                type={activeTab}
+                codec={selectedCodec}
+                selectedFormat={
+                  activeTab === 'video' ? state.selectedVideoFormat : state.selectedAudioFormat
+                }
+                onFormatChange={(formatId) =>
+                  onStateChange(
+                    activeTab === 'video'
+                      ? { selectedVideoFormat: formatId }
+                      : { selectedAudioFormat: formatId }
+                  )
+                }
+              />
+            </ScrollArea>
+          </div>
+        </div>
+      )}
+    </div>
+  )
+}

src/renderer/src/components/download/UnifiedDownloadHistory.tsx

@@ -1,26 +1,159 @@
 import { Button } from '@renderer/components/ui/button'
 import { CardContent, CardHeader } from '@renderer/components/ui/card'
+import { Checkbox } from '@renderer/components/ui/checkbox'
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle
+} from '@renderer/components/ui/dialog'
 import { cn } from '@renderer/lib/utils'
-import { useAtomValue } from 'jotai'
+import { useAtomValue, useSetAtom } from 'jotai'
 import { History as HistoryIcon } from 'lucide-react'
-import { useMemo, useState } from 'react'
+import { useEffect, useId, useMemo, useState } from 'react'
 import { useTranslation } from 'react-i18next'
+import { toast } from 'sonner'
 import { useHistorySync } from '../../hooks/use-history-sync'
+import { ipcServices } from '../../lib/ipc'
 import type { DownloadRecord } from '../../store/downloads'
-import { downloadStatsAtom, downloadsArrayAtom } from '../../store/downloads'
+import {
+  downloadStatsAtom,
+  downloadsArrayAtom,
+  removeHistoryRecordsAtom,
+  removeHistoryRecordsByPlaylistAtom
+} from '../../store/downloads'
+import { settingsAtom } from '../../store/settings'
+import { ScrollArea } from '../ui/scroll-area'
+import { DownloadDialog } from './DownloadDialog'
 import { DownloadItem } from './DownloadItem'
 import { PlaylistDownloadGroup } from './PlaylistDownloadGroup'
 
 type StatusFilter = 'all' | 'active' | 'completed' | 'error'
+type ConfirmAction =
+  | { type: 'delete-selected'; ids: string[] }
+  | { type: 'delete-playlist'; playlistId: string; title: string; ids: string[] }
 
-export function UnifiedDownloadHistory() {
+const normalizeSavedFileName = (fileName?: string): string | undefined => {
+  if (!fileName) {
+    return undefined
+  }
+  const trimmed = fileName.trim()
+  if (!trimmed) {
+    return undefined
+  }
+  return trimmed.replace(/\.f\d+(?=\.[^.]+$)/i, '')
+}
+
+const generateFilePathCandidates = (
+  downloadPath: string,
+  title: string,
+  format: string,
+  savedFileName?: string
+): string[] => {
+  const normalizedDownloadPath = downloadPath.replace(/\\/g, '/')
+  const safeTitle = title.trim() || 'Unknown'
+
+  const savedNameCandidates: string[] = []
+  const trimmedSavedFileName = savedFileName?.trim()
+  if (trimmedSavedFileName) {
+    const normalized = normalizeSavedFileName(trimmedSavedFileName)
+    if (normalized) {
+      savedNameCandidates.push(normalized)
+    }
+    if (!normalized || normalized !== trimmedSavedFileName) {
+      savedNameCandidates.push(trimmedSavedFileName)
+    }
+  }
+
+  const candidateFileNames =
+    savedNameCandidates.length > 0
+      ? savedNameCandidates
+      : [`${safeTitle} via VidBee.${format}`, `${safeTitle}.${format}`]
+  return Array.from(
+    new Set(candidateFileNames.map((fileName) => `${normalizedDownloadPath}/${fileName}`))
+  )
+}
+
+const tryFileOperation = async (
+  paths: string[],
+  operation: (filePath: string) => Promise<boolean>
+): Promise<boolean> => {
+  for (const filePath of paths) {
+    const success = await operation(filePath)
+    if (success) {
+      return true
+    }
+  }
+  return false
+}
+
+const getSavedFileExtension = (fileName?: string): string | undefined => {
+  const normalized = normalizeSavedFileName(fileName)
+  if (!normalized) {
+    return undefined
+  }
+  if (!normalized.includes('.')) {
+    return undefined
+  }
+  const ext = normalized.split('.').pop()
+  return ext?.toLowerCase()
+}
+
+const resolveDownloadExtension = (download: DownloadRecord): string => {
+  const savedExt = getSavedFileExtension(download.savedFileName)
+  if (savedExt) {
+    return savedExt
+  }
+  const selectedExt = download.selectedFormat?.ext?.toLowerCase()
+  if (selectedExt) {
+    return selectedExt
+  }
+  return download.type === 'audio' ? 'mp3' : 'mp4'
+}
+
+const isEditableTarget = (target: EventTarget | null): boolean => {
+  if (!target || !(target instanceof HTMLElement)) {
+    return false
+  }
+  if (target.isContentEditable) {
+    return true
+  }
+  const tagName = target.tagName
+  return tagName === 'INPUT' || tagName === 'TEXTAREA' || tagName === 'SELECT'
+}
+
+interface UnifiedDownloadHistoryProps {
+  onOpenSupportedSites?: () => void
+  onOpenSettings?: () => void
+}
+
+export function UnifiedDownloadHistory({
+  onOpenSupportedSites,
+  onOpenSettings
+}: UnifiedDownloadHistoryProps) {
   const { t } = useTranslation()
   const allRecords = useAtomValue(downloadsArrayAtom)
   const downloadStats = useAtomValue(downloadStatsAtom)
+  const removeHistoryRecords = useSetAtom(removeHistoryRecordsAtom)
+  const removeHistoryRecordsByPlaylist = useSetAtom(removeHistoryRecordsByPlaylistAtom)
+  const settings = useAtomValue(settingsAtom)
   const [statusFilter, setStatusFilter] = useState<StatusFilter>('all')
+  const [selectedIds, setSelectedIds] = useState<Set<string>>(new Set())
+  const [confirmAction, setConfirmAction] = useState<ConfirmAction | null>(null)
+  const [confirmBusy, setConfirmBusy] = useState(false)
+  const [alsoDeleteFiles, setAlsoDeleteFiles] = useState(false)
+  const alsoDeleteFilesId = useId()
 
   useHistorySync()
 
+  const historyRecords = useMemo(
+    () => allRecords.filter((record) => record.entryType === 'history'),
+    [allRecords]
+  )
+  const selectedCount = selectedIds.size
+
   const filteredRecords = useMemo(() => {
     return allRecords.filter((record) => {
       switch (statusFilter) {
@@ -41,6 +174,12 @@ export function UnifiedDownloadHistory() {
     })
   }, [allRecords, statusFilter])
 
+  const visibleHistoryIds = useMemo(
+    () =>
+      filteredRecords.filter((record) => record.entryType === 'history').map((record) => record.id),
+    [filteredRecords]
+  )
+
   const filters: Array<{ key: StatusFilter; label: string; count: number }> = [
     { key: 'all', label: t('download.all'), count: downloadStats.total },
     { key: 'active', label: t('download.active'), count: downloadStats.active },
@@ -48,6 +187,209 @@ export function UnifiedDownloadHistory() {
     { key: 'error', label: t('download.error'), count: downloadStats.error }
   ]
 
+  const selectableIds = useMemo(() => {
+    if (visibleHistoryIds.length === 0) {
+      return []
+    }
+    const ids = new Set(visibleHistoryIds)
+    const playlistIds = new Set(
+      filteredRecords
+        .filter((record) => record.entryType === 'history' && record.playlistId)
+        .map((record) => record.playlistId as string)
+    )
+    if (playlistIds.size === 0) {
+      return Array.from(ids)
+    }
+    for (const record of historyRecords) {
+      if (record.playlistId && playlistIds.has(record.playlistId)) {
+        ids.add(record.id)
+      }
+    }
+    return Array.from(ids)
+  }, [filteredRecords, historyRecords, visibleHistoryIds])
+  const selectableCount = selectableIds.length
+  const visibleSelectableCount = visibleHistoryIds.length
+  const selectionSummary =
+    selectableCount === 0
+      ? t('history.selectedCount', { count: selectedCount })
+      : selectableCount > visibleSelectableCount
+        ? t('history.selectedCount', { count: selectedCount })
+        : t('history.selectionSummary', { selected: selectedCount, total: selectableCount })
+
+  useEffect(() => {
+    if (selectedIds.size === 0) {
+      return
+    }
+    const historyIdSet = new Set(historyRecords.map((record) => record.id))
+    setSelectedIds((prev) => {
+      let changed = false
+      const next = new Set<string>()
+      for (const id of prev) {
+        if (historyIdSet.has(id)) {
+          next.add(id)
+        } else {
+          changed = true
+        }
+      }
+      return changed ? next : prev
+    })
+  }, [historyRecords, selectedIds.size])
+
+  const handleToggleSelect = (id: string) => {
+    setSelectedIds((prev) => {
+      const next = new Set(prev)
+      if (next.has(id)) {
+        next.delete(id)
+      } else {
+        next.add(id)
+      }
+      return next
+    })
+  }
+
+  const handleClearSelection = () => {
+    setSelectedIds(new Set())
+  }
+
+  const handleSelectAll = () => {
+    if (selectableIds.length === 0) {
+      return
+    }
+    setSelectedIds(new Set(selectableIds))
+  }
+
+  const handleRequestDeleteSelected = () => {
+    if (selectedIds.size === 0) {
+      return
+    }
+    setConfirmAction({ type: 'delete-selected', ids: Array.from(selectedIds) })
+  }
+
+  const handleRequestDeletePlaylist = (playlistId: string, title: string, ids: string[]) => {
+    if (ids.length === 0) {
+      return
+    }
+    setConfirmAction({ type: 'delete-playlist', playlistId, title, ids })
+  }
+
+  const pruneSelectedIds = (ids: string[]) => {
+    if (ids.length === 0) {
+      return
+    }
+    setSelectedIds((prev) => {
+      const next = new Set(prev)
+      let changed = false
+      ids.forEach((id) => {
+        if (next.delete(id)) {
+          changed = true
+        }
+      })
+      return changed ? next : prev
+    })
+  }
+
+  const confirmContent = useMemo(() => {
+    if (!confirmAction) {
+      return null
+    }
+    switch (confirmAction.type) {
+      case 'delete-selected': {
+        return {
+          title: t('history.confirmDeleteSelectedTitle'),
+          description: t('history.confirmDeleteSelectedDescription', {
+            count: confirmAction.ids.length
+          }),
+          actionLabel: t('history.removeAction')
+        }
+      }
+      case 'delete-playlist': {
+        return {
+          title: t('history.confirmDeletePlaylistTitle'),
+          description: t('history.confirmDeletePlaylistDescription', {
+            count: confirmAction.ids.length,
+            title: confirmAction.title
+          }),
+          actionLabel: t('history.removeAction')
+        }
+      }
+      default:
+        return null
+    }
+  }, [confirmAction, t])
+
+  const deleteHistoryFiles = async (records: DownloadRecord[]) => {
+    const failedIds: string[] = []
+    for (const record of records) {
+      if (!record.title) {
+        continue
+      }
+      const downloadPath = record.downloadPath || settings.downloadPath
+      if (!downloadPath) {
+        continue
+      }
+      const formatForPath = resolveDownloadExtension(record)
+      const filePaths = generateFilePathCandidates(
+        downloadPath,
+        record.title,
+        formatForPath,
+        record.savedFileName
+      )
+      const deleted = await tryFileOperation(filePaths, (filePath) =>
+        ipcServices.fs.deleteFile(filePath)
+      )
+      if (!deleted) {
+        failedIds.push(record.id)
+      }
+    }
+    if (failedIds.length > 0) {
+      console.warn('Failed to delete some playlist files:', failedIds)
+    }
+  }
+
+  const handleConfirmAction = async () => {
+    if (!confirmAction) {
+      return
+    }
+    setConfirmBusy(true)
+    try {
+      if (confirmAction.type === 'delete-selected') {
+        await ipcServices.history.removeHistoryItems(confirmAction.ids)
+        removeHistoryRecords(confirmAction.ids)
+        if (alsoDeleteFiles) {
+          const idSet = new Set(confirmAction.ids)
+          const recordsToDelete = historyRecords.filter((record) => idSet.has(record.id))
+          await deleteHistoryFiles(recordsToDelete)
+        }
+        pruneSelectedIds(confirmAction.ids)
+        toast.success(t('notifications.itemsRemoved', { count: confirmAction.ids.length }))
+      }
+      if (confirmAction.type === 'delete-playlist') {
+        const idSet = new Set(confirmAction.ids)
+        const playlistRecords = historyRecords.filter((record) => idSet.has(record.id))
+        await ipcServices.history.removeHistoryByPlaylistId(confirmAction.playlistId)
+        removeHistoryRecordsByPlaylist(confirmAction.playlistId)
+        await deleteHistoryFiles(playlistRecords)
+        pruneSelectedIds(confirmAction.ids)
+        toast.success(
+          t('notifications.playlistHistoryRemoved', { count: confirmAction.ids.length })
+        )
+      }
+      setConfirmAction(null)
+      setAlsoDeleteFiles(false)
+    } catch (error) {
+      if (confirmAction.type === 'delete-selected') {
+        console.error('Failed to remove selected history items:', error)
+        toast.error(t('notifications.itemsRemoveFailed'))
+      }
+      if (confirmAction.type === 'delete-playlist') {
+        console.error('Failed to remove playlist history:', error)
+        toast.error(t('notifications.playlistHistoryRemoveFailed'))
+      }
+    } finally {
+      setConfirmBusy(false)
+    }
+  }
+
   const groupedView = useMemo(() => {
     const groups = new Map<
       string,
@@ -98,74 +440,208 @@ export function UnifiedDownloadHistory() {
     return { order, groups }
   }, [filteredRecords])
 
+  useEffect(() => {
+    const handleKeyDown = (event: KeyboardEvent) => {
+      if (event.defaultPrevented) {
+        return
+      }
+      if (isEditableTarget(event.target)) {
+        return
+      }
+      if (event.key === 'Escape') {
+        if (confirmAction) {
+          return
+        }
+        if (selectedIds.size === 0) {
+          return
+        }
+        setSelectedIds(new Set())
+        return
+      }
+      if (!(event.metaKey || event.ctrlKey)) {
+        return
+      }
+      if (event.key.toLowerCase() !== 'a') {
+        return
+      }
+      if (selectableIds.length === 0) {
+        return
+      }
+      event.preventDefault()
+      setSelectedIds(new Set(selectableIds))
+    }
+
+    window.addEventListener('keydown', handleKeyDown)
+    return () => window.removeEventListener('keydown', handleKeyDown)
+  }, [confirmAction, selectableIds, selectedIds])
+
   return (
-    <div className="space-y-4">
-      <CardHeader className="gap-4 p-0">
-        <div className="flex flex-wrap items-center gap-2 text-sm">
-          {filters.map((filter) => {
-            const isActive = statusFilter === filter.key
-            return (
-              <Button
-                key={filter.key}
-                variant={isActive ? 'secondary' : 'ghost'}
-                size="sm"
-                className={
-                  isActive
-                    ? 'h-8 rounded-full px-3 shadow-sm'
-                    : 'h-8 rounded-full border border-border/60 px-3'
-                }
-                onClick={() => setStatusFilter(filter.key)}
-              >
-                <span>{filter.label}</span>
-                <span
-                  className={cn(
-                    'ml-1 min-w-5 rounded-full px-1 text-xs font-medium text-neutral-900',
-                    isActive ? ' bg-neutral-100' : ' bg-neutral-200'
-                  )}
-                >
-                  {filter.count}
-                </span>
-              </Button>
-            )
-          })}
-        </div>
-      </CardHeader>
-      <CardContent className="space-y-3 p-0 overflow-hidden w-full">
-        {filteredRecords.length === 0 ? (
-          <div className="flex flex-col items-center justify-center gap-3 rounded-lg border border-dashed border-border/60 px-6 py-10 text-center text-muted-foreground">
-            <HistoryIcon className="h-10 w-10 opacity-50" />
-            <p className="text-sm font-medium">{t('download.noItems')}</p>
-          </div>
-        ) : (
-          <div className="space-y-3 sm:space-y-4 overflow-hidden w-full">
-            {groupedView.order.map((item) => {
-              if (item.type === 'single') {
-                return (
-                  <DownloadItem
-                    key={`${item.record.entryType}:${item.record.id}`}
-                    download={item.record}
-                  />
-                )
-              }
-
-              const group = groupedView.groups.get(item.id)
-              if (!group) {
-                return null
-              }
-
+    <div className={cn('flex flex-col h-full')}>
+      <CardHeader className="gap-4 p-0 px-6 py-4 z-50 bg-background backdrop-blur">
+        <div className="flex flex-wrap items-center justify-between gap-2 text-sm">
+          <div className="flex flex-wrap items-center gap-2">
+            {filters.map((filter) => {
+              const isActive = statusFilter === filter.key
               return (
-                <PlaylistDownloadGroup
-                  key={`group:${group.id}`}
-                  groupId={group.id}
-                  title={group.title}
-                  totalCount={group.totalCount}
-                  records={group.records}
-                />
+                <Button
+                  key={filter.key}
+                  variant={isActive ? 'secondary' : 'ghost'}
+                  size="sm"
+                  className={
+                    isActive
+                      ? 'h-8 rounded-full px-3 shadow-sm'
+                      : 'h-8 rounded-full border border-border/60 px-3'
+                  }
+                  onClick={() => setStatusFilter(filter.key)}
+                >
+                  <span>{filter.label}</span>
+                  <span
+                    className={cn(
+                      'ml-1 min-w-5 rounded-full px-1 text-xs font-medium text-neutral-900',
+                      isActive ? ' bg-neutral-100' : ' bg-neutral-200'
+                    )}
+                  >
+                    {filter.count}
+                  </span>
+                </Button>
               )
             })}
           </div>
+          <div className="flex items-center gap-2">
+            <Button
+              variant="ghost"
+              size="sm"
+              className="h-8 rounded-full px-3"
+              onClick={handleSelectAll}
+              disabled={selectableIds.length === 0}
+            >
+              {t('history.selectAll')}
+            </Button>
+            <DownloadDialog
+              onOpenSupportedSites={onOpenSupportedSites}
+              onOpenSettings={onOpenSettings}
+            />
+          </div>
+        </div>
+      </CardHeader>
+      <ScrollArea className="overflow-y-auto flex-1">
+        <CardContent className="space-y-3 p-0 overflow-x-hidden w-full">
+          {filteredRecords.length === 0 ? (
+            <div className="flex flex-col items-center justify-center gap-3 rounded-xl border border-dashed border-border/60 px-6 py-10 text-center text-muted-foreground">
+              <HistoryIcon className="h-10 w-10 opacity-50" />
+              <p className="text-sm font-medium">{t('download.noItems')}</p>
+            </div>
+          ) : (
+            <div className="w-full pb-4">
+              {groupedView.order.map((item) => {
+                if (item.type === 'single') {
+                  return (
+                    <DownloadItem
+                      key={`${item.record.entryType}:${item.record.id}`}
+                      download={item.record}
+                      isSelected={selectedIds.has(item.record.id)}
+                      onToggleSelect={handleToggleSelect}
+                    />
+                  )
+                }
+
+                const group = groupedView.groups.get(item.id)
+                if (!group) {
+                  return null
+                }
+
+                return (
+                  <PlaylistDownloadGroup
+                    key={`group:${group.id}`}
+                    groupId={group.id}
+                    title={group.title}
+                    totalCount={group.totalCount}
+                    records={group.records}
+                    selectedIds={selectedIds}
+                    onToggleSelect={handleToggleSelect}
+                    onDeletePlaylist={handleRequestDeletePlaylist}
+                  />
+                )
+              })}
+            </div>
+          )}
+        </CardContent>
+      </ScrollArea>
+      {selectedCount > 0 && (
+        <div className="fixed bottom-4 left-1/2 z-40 w-[calc(100%-2rem)] -translate-x-1/2 sm:left-auto sm:right-6 sm:translate-x-0 sm:w-auto">
+          <div className="flex flex-wrap items-center justify-between gap-3 rounded-full border border-border/50 bg-background/80 pl-5 pr-2 py-2 shadow-lg backdrop-blur">
+            <div className="flex flex-wrap items-center gap-2">
+              <span className="text-xs text-muted-foreground">{selectionSummary}</span>
+            </div>
+            <div className="flex flex-wrap items-center gap-2">
+              <Button
+                variant="ghost"
+                size="sm"
+                className="h-8 rounded-full px-3"
+                onClick={handleClearSelection}
+              >
+                {t('history.clearSelection')}
+              </Button>
+              <Button
+                variant="destructive"
+                size="sm"
+                className="h-8 rounded-full px-3"
+                onClick={handleRequestDeleteSelected}
+              >
+                {t('history.deleteSelected')}
+              </Button>
+            </div>
+          </div>
+        </div>
+      )}
+      <Dialog
+        open={Boolean(confirmAction)}
+        onOpenChange={(open) => {
+          if (!open && !confirmBusy) {
+            setConfirmAction(null)
+            setAlsoDeleteFiles(false)
+          }
+        }}
+      >
+        {confirmContent && (
+          <DialogContent>
+            <DialogHeader>
+              <DialogTitle>{confirmContent.title}</DialogTitle>
+              <DialogDescription>{confirmContent.description}</DialogDescription>
+            </DialogHeader>
+            {confirmAction?.type === 'delete-selected' && (
+              <div className="flex items-center space-x-2">
+                <Checkbox
+                  id={alsoDeleteFilesId}
+                  checked={alsoDeleteFiles}
+                  onCheckedChange={(checked) => setAlsoDeleteFiles(checked === true)}
+                />
+                <label
+                  htmlFor={alsoDeleteFilesId}
+                  className="text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70 cursor-pointer"
+                >
+                  {t('history.alsoDeleteFiles')}
+                </label>
+              </div>
+            )}
+            <DialogFooter>
+              <Button
+                variant="outline"
+                onClick={() => {
+                  setConfirmAction(null)
+                  setAlsoDeleteFiles(false)
+                }}
+                disabled={confirmBusy}
+              >
+                {t('download.cancel')}
+              </Button>
+              <Button variant="destructive" onClick={handleConfirmAction} disabled={confirmBusy}>
+                {confirmContent.actionLabel}
+              </Button>
+            </DialogFooter>
+          </DialogContent>
         )}
-      </CardContent>
+      </Dialog>
     </div>
   )
 }

src/renderer/src/components/error/ErrorBoundary.tsx

@@ -0,0 +1,152 @@
+import { ipcServices } from '@renderer/lib/ipc'
+import { logger } from '@renderer/lib/logger'
+import { Component, type ErrorInfo, type ReactNode } from 'react'
+import { type ErrorInfo as ErrorInfoType, ErrorPage } from './ErrorPage'
+
+interface Props {
+  children: ReactNode
+  onError?: (error: Error, errorInfo: ErrorInfo) => void
+  fallback?: (errorInfo: ErrorInfoType) => ReactNode
+}
+
+interface State {
+  hasError: boolean
+  errorInfo: ErrorInfoType | null
+}
+
+export class ErrorBoundary extends Component<Props, State> {
+  constructor(props: Props) {
+    super(props)
+    this.state = {
+      hasError: false,
+      errorInfo: null
+    }
+  }
+
+  static getDerivedStateFromError(error: Error): Partial<State> {
+    const errorInfo = {
+      error,
+      timestamp: Date.now(),
+      context: {
+        url: window.location.href,
+        userAgent: navigator.userAgent,
+        platform: navigator.platform
+      }
+    }
+
+    // Log error details immediately
+    logger.error('ErrorBoundary: getDerivedStateFromError called', {
+      errorName: error.name,
+      errorMessage: error.message,
+      errorStack: error.stack,
+      url: errorInfo.context.url,
+      timestamp: errorInfo.timestamp
+    })
+
+    return {
+      hasError: true,
+      errorInfo
+    }
+  }
+
+  async componentDidCatch(error: Error, errorInfo: ErrorInfo): Promise<void> {
+    logger.error('ErrorBoundary caught an error:', {
+      errorName: error.name,
+      errorMessage: error.message,
+      errorStack: error.stack,
+      componentStack: errorInfo.componentStack,
+      errorInfo: JSON.stringify(errorInfo, null, 2)
+    })
+
+    // Get app version if available
+    let appVersion: string | undefined
+    try {
+      if (window?.api && ipcServices?.app) {
+        appVersion = await ipcServices.app.getVersion()
+        logger.info('ErrorBoundary: App version retrieved', { appVersion })
+      }
+    } catch (err) {
+      logger.warn('Failed to get app version:', err)
+    }
+
+    // Update state with component stack and version
+    if (this.state.errorInfo) {
+      this.setState({
+        errorInfo: {
+          ...this.state.errorInfo,
+          context: {
+            ...this.state.errorInfo.context,
+            version: appVersion
+          },
+          errorInfo: {
+            componentStack: errorInfo.componentStack || undefined
+          }
+        }
+      })
+    }
+
+    // Call optional error handler
+    if (this.props.onError) {
+      this.props.onError(error, errorInfo)
+    }
+
+    // Send error to main process if available
+    if (window?.api) {
+      try {
+        window.api.send('error:renderer', {
+          error: {
+            name: error.name,
+            message: error.message,
+            stack: error.stack
+          },
+          errorInfo: {
+            componentStack: errorInfo.componentStack
+          },
+          timestamp: Date.now(),
+          context: {
+            url: window.location.href,
+            userAgent: navigator.userAgent,
+            platform: navigator.platform,
+            version: appVersion
+          }
+        })
+      } catch (err) {
+        logger.error('Failed to send error to main process:', err)
+      }
+    }
+  }
+
+  handleReload = (): void => {
+    this.setState({
+      hasError: false,
+      errorInfo: null
+    })
+    window.location.reload()
+  }
+
+  handleGoHome = (): void => {
+    this.setState({
+      hasError: false,
+      errorInfo: null
+    })
+    window.location.hash = '/'
+    window.location.reload()
+  }
+
+  render(): ReactNode {
+    if (this.state.hasError && this.state.errorInfo) {
+      if (this.props.fallback) {
+        return this.props.fallback(this.state.errorInfo)
+      }
+      return (
+        <ErrorPage
+          errorInfo={this.state.errorInfo}
+          onReload={this.handleReload}
+          onGoHome={this.handleGoHome}
+        />
+      )
+    }
+
+    return this.props.children
+  }
+}

src/renderer/src/components/error/ErrorPage.tsx

@@ -0,0 +1,200 @@
+import { Button } from '@renderer/components/ui/button'
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle
+} from '@renderer/components/ui/card'
+import { ScrollArea } from '@renderer/components/ui/scroll-area'
+import { Textarea } from '@renderer/components/ui/textarea'
+import { logger } from '@renderer/lib/logger'
+import { AlertTriangle, Copy, Home, RefreshCw } from 'lucide-react'
+import { useState } from 'react'
+import { useTranslation } from 'react-i18next'
+import { toast } from 'sonner'
+
+export interface ErrorInfo {
+  error: Error
+  errorInfo?: {
+    componentStack?: string
+  }
+  timestamp: number
+  context?: {
+    url?: string
+    userAgent?: string
+    platform?: string
+    version?: string
+  }
+}
+
+interface ErrorPageProps {
+  errorInfo: ErrorInfo
+  onReload?: () => void
+  onGoHome?: () => void
+}
+
+export function ErrorPage({ errorInfo, onReload, onGoHome }: ErrorPageProps) {
+  const { t } = useTranslation()
+  const [showDetails, setShowDetails] = useState(false)
+  const [copied, setCopied] = useState(false)
+
+  const errorReport = generateErrorReport(errorInfo)
+
+  const handleCopy = async () => {
+    try {
+      await navigator.clipboard.writeText(errorReport)
+      setCopied(true)
+      toast.success(t('error.copySuccess'))
+      setTimeout(() => setCopied(false), 2000)
+    } catch (error) {
+      logger.error('Failed to copy error report:', error)
+      toast.error(t('error.copyFailed'))
+    }
+  }
+
+  const handleReload = () => {
+    if (onReload) {
+      onReload()
+    } else {
+      window.location.reload()
+    }
+  }
+
+  return (
+    <div className="flex items-center justify-center min-h-screen bg-background p-4">
+      <Card className="w-full max-w-3xl">
+        <CardHeader>
+          <div className="flex items-center gap-3">
+            <div className="flex-shrink-0">
+              <AlertTriangle className="h-8 w-8 text-destructive" />
+            </div>
+            <div className="flex-1">
+              <CardTitle className="text-2xl">{t('error.title')}</CardTitle>
+              <CardDescription className="mt-2">{t('error.description')}</CardDescription>
+            </div>
+          </div>
+        </CardHeader>
+        <CardContent className="space-y-4">
+          {/* Error Message */}
+          <div className="rounded-md bg-destructive/10 border border-destructive/20 p-4">
+            <p className="text-sm font-medium text-destructive mb-1">{t('error.message')}</p>
+            <p className="text-sm text-foreground break-words">
+              {errorInfo.error.message || t('error.unknownError')}
+            </p>
+          </div>
+
+          {/* Actions */}
+          <div className="flex flex-wrap gap-2">
+            {onGoHome && (
+              <Button variant="outline" onClick={onGoHome}>
+                <Home className="h-4 w-4 mr-2" />
+                {t('error.goHome')}
+              </Button>
+            )}
+            <Button variant="outline" onClick={handleReload}>
+              <RefreshCw className="h-4 w-4 mr-2" />
+              {t('error.reload')}
+            </Button>
+            <Button variant="outline" onClick={handleCopy}>
+              <Copy className="h-4 w-4 mr-2" />
+              {copied ? t('error.copied') : t('error.copyReport')}
+            </Button>
+            <Button variant="ghost" onClick={() => setShowDetails(!showDetails)}>
+              {showDetails ? t('error.hideDetails') : t('error.showDetails')}
+            </Button>
+          </div>
+
+          {/* Error Details */}
+          {showDetails && (
+            <div className="space-y-4">
+              <div>
+                <p className="text-sm font-medium mb-2">{t('error.stackTrace')}</p>
+                <ScrollArea className="h-48 rounded-md border bg-muted/50 p-4">
+                  <pre className="text-xs font-mono whitespace-pre-wrap break-words">
+                    {errorInfo.error.stack || t('error.noStackTrace')}
+                  </pre>
+                </ScrollArea>
+              </div>
+
+              {errorInfo.errorInfo?.componentStack && (
+                <div>
+                  <p className="text-sm font-medium mb-2">{t('error.componentStack')}</p>
+                  <ScrollArea className="h-32 rounded-md border bg-muted/50 p-4">
+                    <pre className="text-xs font-mono whitespace-pre-wrap break-words">
+                      {errorInfo.errorInfo.componentStack}
+                    </pre>
+                  </ScrollArea>
+                </div>
+              )}
+
+              <div>
+                <p className="text-sm font-medium mb-2">{t('error.fullReport')}</p>
+                <Textarea
+                  readOnly
+                  value={errorReport}
+                  className="font-mono text-xs min-h-48"
+                  onClick={(e) => {
+                    const target = e.target as HTMLTextAreaElement
+                    target.select()
+                  }}
+                />
+              </div>
+            </div>
+          )}
+
+          {/* Help Text */}
+          <div className="rounded-md bg-muted/50 border p-4">
+            <p className="text-sm text-muted-foreground">{t('error.helpText')}</p>
+          </div>
+        </CardContent>
+      </Card>
+    </div>
+  )
+}
+
+function generateErrorReport(errorInfo: ErrorInfo): string {
+  const lines: string[] = []
+
+  lines.push('=== VidBee Error Report ===')
+  lines.push(`Timestamp: ${new Date(errorInfo.timestamp).toISOString()}`)
+  lines.push('')
+
+  if (errorInfo.context) {
+    lines.push('--- Context ---')
+    if (errorInfo.context.version) {
+      lines.push(`App Version: ${errorInfo.context.version}`)
+    }
+    if (errorInfo.context.platform) {
+      lines.push(`Platform: ${errorInfo.context.platform}`)
+    }
+    if (errorInfo.context.url) {
+      lines.push(`URL: ${errorInfo.context.url}`)
+    }
+    if (errorInfo.context.userAgent) {
+      lines.push(`User Agent: ${errorInfo.context.userAgent}`)
+    }
+    lines.push('')
+  }
+
+  lines.push('--- Error ---')
+  lines.push(`Name: ${errorInfo.error.name}`)
+  lines.push(`Message: ${errorInfo.error.message}`)
+  lines.push('')
+
+  if (errorInfo.error.stack) {
+    lines.push('--- Stack Trace ---')
+    lines.push(errorInfo.error.stack)
+    lines.push('')
+  }
+
+  if (errorInfo.errorInfo?.componentStack) {
+    lines.push('--- Component Stack ---')
+    lines.push(errorInfo.errorInfo.componentStack)
+    lines.push('')
+  }
+
+  lines.push('=== End of Report ===')
+
+  return lines.join('\n')
+}

src/renderer/src/components/feedback/FeedbackLinks.tsx

@@ -0,0 +1,244 @@
+import { Button, type ButtonProps } from '@renderer/components/ui/button'
+import { ipcServices } from '@renderer/lib/ipc'
+import { Github, MessageCircle, Twitter } from 'lucide-react'
+import { type MouseEvent, useEffect, useMemo, useState } from 'react'
+import { useTranslation } from 'react-i18next'
+import { toast } from 'sonner'
+
+type AppInfo = {
+  appVersion: string
+  osVersion: string
+}
+
+const DEFAULT_APP_INFO: AppInfo = { appVersion: '', osVersion: '' }
+const FEEDBACK_TWEET_PREFIX = '@nexmoex VidBee'
+export const DOWNLOAD_FEEDBACK_ISSUE_TITLE = '[Bug]: Download error report'
+const FEEDBACK_UNKNOWN_ERROR = 'Unknown error'
+const FEEDBACK_UNKNOWN_VALUE = 'Unknown'
+const FEEDBACK_SOURCE_LABEL = 'Source URL'
+const FEEDBACK_ERROR_LABEL = 'Error'
+const FEEDBACK_COMMAND_LABEL = 'yt-dlp command'
+const FEEDBACK_MAX_GITHUB_URL_LENGTH = 7000
+
+let cachedAppInfo: AppInfo | null = null
+let appInfoPromise: Promise<AppInfo> | null = null
+
+const normalizeErrorText = (value?: string | null): string =>
+  value ? value.replace(/\s+/g, ' ').trim() : ''
+
+const clampText = (value: string, maxLength: number): string =>
+  value.length > maxLength ? `${value.slice(0, maxLength - 3)}...` : value
+
+const buildIssueLogs = (
+  errorText: string,
+  sourceUrl: string | undefined,
+  ytDlpCommand: string | undefined,
+  urlLabel: string,
+  errorLabel: string,
+  commandLabel: string
+): string => {
+  const lines: string[] = []
+  if (sourceUrl) {
+    lines.push(`**${urlLabel}:**\n${sourceUrl}\n`)
+  }
+  if (ytDlpCommand) {
+    lines.push(`**${commandLabel}:**\n\`\`\`bash\n${ytDlpCommand}\n\`\`\`\n`)
+  }
+  lines.push(`**${errorLabel}:**\n${errorText}`)
+  return lines.join('\n')
+}
+
+const loadAppInfo = async (): Promise<AppInfo> => {
+  if (cachedAppInfo) {
+    return cachedAppInfo
+  }
+  if (appInfoPromise) {
+    return appInfoPromise
+  }
+
+  appInfoPromise = (async () => {
+    try {
+      const [version, osRelease] = await Promise.all([
+        ipcServices.app.getVersion(),
+        ipcServices.app.getOsVersion()
+      ])
+      cachedAppInfo = { appVersion: version, osVersion: osRelease }
+    } catch (error) {
+      console.error('Failed to load app info for feedback links:', error)
+      cachedAppInfo = DEFAULT_APP_INFO
+    }
+    return cachedAppInfo
+  })()
+
+  return appInfoPromise
+}
+
+export const useAppInfo = (): AppInfo => {
+  const [appInfo, setAppInfo] = useState<AppInfo>(DEFAULT_APP_INFO)
+
+  useEffect(() => {
+    let isActive = true
+
+    const loadInfo = async () => {
+      const info = await loadAppInfo()
+      if (isActive) {
+        setAppInfo(info)
+      }
+    }
+
+    void loadInfo()
+
+    return () => {
+      isActive = false
+    }
+  }, [])
+
+  return appInfo
+}
+
+type FeedbackLinkButtonsProps = {
+  error?: string | null
+  sourceUrl?: string | null
+  issueTitle?: string
+  includeAppInfo?: boolean
+  appInfo?: AppInfo
+  buttonVariant?: ButtonProps['variant']
+  buttonSize?: ButtonProps['size']
+  buttonClassName?: string
+  iconClassName?: string
+  onLinkClick?: (event: MouseEvent<HTMLAnchorElement>) => void
+  ytDlpCommand?: string
+  useSimpleGithubUrl?: boolean
+}
+
+export const FeedbackLinkButtons = ({
+  error,
+  sourceUrl,
+  issueTitle = '[Bug]: ',
+  includeAppInfo = false,
+  appInfo,
+  buttonVariant = 'outline',
+  buttonSize = 'sm',
+  buttonClassName,
+  iconClassName,
+  onLinkClick,
+  ytDlpCommand,
+  useSimpleGithubUrl = false
+}: FeedbackLinkButtonsProps) => {
+  const { t } = useTranslation()
+  const fallbackAppInfo = useAppInfo()
+  const { appVersion, osVersion } = appInfo ?? fallbackAppInfo
+
+  const links = useMemo(() => {
+    const compactError = normalizeErrorText(error)
+    const tweetError = compactError ? clampText(compactError, 160) : ''
+    const versionLabels = [
+      appVersion ? `v${appVersion}` : null,
+      osVersion ? osVersion : null
+    ].filter(Boolean)
+    const tweetPrefix = versionLabels.length
+      ? `${FEEDBACK_TWEET_PREFIX} ${versionLabels.join(' ')}`
+      : FEEDBACK_TWEET_PREFIX
+    const tweetText = encodeURIComponent(
+      tweetError ? `${tweetPrefix} - ${tweetError}` : tweetPrefix
+    )
+    const issueError = compactError || FEEDBACK_UNKNOWN_ERROR
+    const resolvedSourceUrl = sourceUrl?.trim() || undefined
+    const normalizedCommand = ytDlpCommand?.trim() || undefined
+    const shouldIncludeLogs = Boolean(compactError || resolvedSourceUrl || normalizedCommand)
+    const issueLogs = shouldIncludeLogs
+      ? buildIssueLogs(
+          issueError,
+          resolvedSourceUrl,
+          normalizedCommand,
+          FEEDBACK_SOURCE_LABEL,
+          FEEDBACK_ERROR_LABEL,
+          FEEDBACK_COMMAND_LABEL
+        )
+      : null
+    const appVersionValue = appVersion ? `VidBee v${appVersion}` : FEEDBACK_UNKNOWN_VALUE
+    const osVersionValue = osVersion || FEEDBACK_UNKNOWN_VALUE
+
+    let githubUrl: string
+    if (useSimpleGithubUrl) {
+      githubUrl = 'https://github.com/nexmoe/VidBee/issues/new/choose'
+    } else {
+      const issueParams = new URLSearchParams({
+        template: 'bug_report.yml',
+        title: issueTitle
+      })
+
+      if (issueLogs) {
+        issueParams.set('logs', issueLogs)
+      }
+      if (includeAppInfo) {
+        issueParams.set('app_version', appVersionValue)
+        issueParams.set('os_version', osVersionValue)
+      }
+
+      githubUrl = `https://github.com/nexmoe/VidBee/issues/new?${issueParams.toString()}`
+    }
+
+    return [
+      {
+        icon: Github,
+        label: t('about.resources.githubIssues'),
+        href: githubUrl
+      },
+      {
+        icon: Twitter,
+        label: t('about.resources.xFeedback'),
+        href: `https://x.com/intent/tweet?text=${tweetText}`
+      },
+      {
+        icon: MessageCircle,
+        label: t('about.resources.discord'),
+        href: 'https://discord.gg/uBqXV6QPdm'
+      }
+    ]
+  }, [
+    appVersion,
+    error,
+    includeAppInfo,
+    issueTitle,
+    osVersion,
+    sourceUrl,
+    t,
+    ytDlpCommand,
+    useSimpleGithubUrl
+  ])
+
+  const handleLinkClick = (event: MouseEvent<HTMLAnchorElement>, href: string) => {
+    if (href.startsWith('https://github.com') && href.length >= FEEDBACK_MAX_GITHUB_URL_LENGTH) {
+      toast.info(t('download.feedback.githubUrlTooLong'))
+    }
+    onLinkClick?.(event)
+  }
+
+  return (
+    <>
+      {links.map((resource) => {
+        const Icon = resource.icon
+        return (
+          <Button
+            key={resource.label}
+            variant={buttonVariant}
+            size={buttonSize}
+            className={buttonClassName}
+            asChild
+          >
+            <a
+              href={resource.href}
+              target="_blank"
+              rel="noreferrer"
+              onClick={(event) => handleLinkClick(event, resource.href)}
+            >
+              <Icon className={iconClassName} />
+              {resource.label}
+            </a>
+          </Button>
+        )
+      })}
+    </>
+  )
+}

src/renderer/src/components/subscription/SubscriptionFormDialog.tsx

@@ -1,4 +1,5 @@
 import { Button } from '@renderer/components/ui/button'
+import { Checkbox } from '@renderer/components/ui/checkbox'
 import {
   Dialog,
   DialogContent,
@@ -11,9 +12,10 @@ import { Input } from '@renderer/components/ui/input'
 import { Label } from '@renderer/components/ui/label'
 import { Switch } from '@renderer/components/ui/switch'
 import { ipcServices } from '@renderer/lib/ipc'
+import { cn } from '@renderer/lib/utils'
 import { settingsAtom } from '@renderer/store/settings'
 import { resolveFeedAtom } from '@renderer/store/subscriptions'
-import type { SubscriptionRule } from '@shared/types'
+import { DEFAULT_SUBSCRIPTION_FILENAME_TEMPLATE, type SubscriptionRule } from '@shared/types'
 import { useAtom, useSetAtom } from 'jotai'
 import { ChevronRight } from 'lucide-react'
 import { useEffect, useId, useRef, useState } from 'react'
@@ -26,7 +28,15 @@ const sanitizeCommaList = (value: string) =>
     .map((entry) => entry.trim())
     .filter((entry, index, array) => entry.length > 0 && array.indexOf(entry) === index)
 
-const sanitizeTemplateInput = (value: string) => value.replace(/[/\\]+/g, '-')
+const sanitizeTemplateInput = (value: string) => value.replace(/\\/g, '/').replace(/\/{2,}/g, '/')
+
+const buildDefaultSubscriptionDirectory = (downloadPath: string) => {
+  const trimmed = downloadPath.trim().replace(/[\\/]+$/, '')
+  if (!trimmed) {
+    return 'Subscriptions'
+  }
+  return `${trimmed}/Subscriptions`
+}
 
 export interface SubscriptionFormData {
   url?: string
@@ -69,8 +79,10 @@ export function SubscriptionFormDialog({
   const [detectingFeed, setDetectingFeed] = useState(false)
 
   const detectTimeout = useRef<NodeJS.Timeout | null>(null)
-  const prevDefaultPathRef = useRef(settings.downloadPath)
+  const prevDefaultPathRef = useRef(buildDefaultSubscriptionDirectory(settings.downloadPath))
   const urlInputId = useId()
+  const advancedOptionsId = useId()
+  const [advancedOptionsOpen, setAdvancedOptionsOpen] = useState(false)
 
   // Initialize form values based on mode
   useEffect(() => {
@@ -78,6 +90,8 @@ export function SubscriptionFormDialog({
       return
     }
 
+    setAdvancedOptionsOpen(false)
+
     if (mode === 'edit' && subscription) {
       setUrl(subscription.feedUrl)
       setKeywords(subscription.keywords.join(', '))
@@ -91,22 +105,15 @@ export function SubscriptionFormDialog({
       setKeywords('')
       setTags('')
       setOnlyLatest(settings.subscriptionOnlyLatestDefault)
-      setDownloadDirectory(settings.downloadPath)
-      setNamingTemplate(settings.subscriptionFilenameTemplate)
+      setDownloadDirectory(buildDefaultSubscriptionDirectory(settings.downloadPath))
+      setNamingTemplate(DEFAULT_SUBSCRIPTION_FILENAME_TEMPLATE)
     }
-  }, [
-    open,
-    mode,
-    subscription,
-    settings.subscriptionOnlyLatestDefault,
-    settings.downloadPath,
-    settings.subscriptionFilenameTemplate
-  ])
+  }, [open, mode, subscription, settings.subscriptionOnlyLatestDefault, settings.downloadPath])
 
   // Sync download directory with settings changes (only in add mode)
   useEffect(() => {
     if (mode === 'add') {
-      const newPath = settings.downloadPath
+      const newPath = buildDefaultSubscriptionDirectory(settings.downloadPath)
       setDownloadDirectory((prev) => {
         if (!prev || prev === prevDefaultPathRef.current) {
           return newPath
@@ -117,13 +124,6 @@ export function SubscriptionFormDialog({
     }
   }, [settings.downloadPath, mode])
 
-  // Sync naming template with settings changes (only in add mode)
-  useEffect(() => {
-    if (mode === 'add') {
-      setNamingTemplate(settings.subscriptionFilenameTemplate)
-    }
-  }, [settings.subscriptionFilenameTemplate, mode])
-
   // Sync onlyLatest with settings changes (only in add mode)
   useEffect(() => {
     if (mode === 'add') {
@@ -265,14 +265,6 @@ export function SubscriptionFormDialog({
               </div>
             )}
           </div>
-          <div className="space-y-2">
-            <Label>{t('subscriptions.fields.keywords')}</Label>
-            <Input value={keywords} onChange={(event) => setKeywords(event.target.value)} />
-          </div>
-          <div className="space-y-2">
-            <Label>{t('subscriptions.fields.tags')}</Label>
-            <Input value={tags} onChange={(event) => setTags(event.target.value)} />
-          </div>
           <div className="space-y-2">
             <Label>{t('subscriptions.fields.customDirectory')}</Label>
             <div className="flex gap-2">
@@ -282,25 +274,62 @@ export function SubscriptionFormDialog({
               </Button>
             </div>
           </div>
-          <div className="space-y-2">
-            <Label>{t('subscriptions.fields.namingTemplate')}</Label>
-            <Input
-              value={namingTemplate}
-              onChange={(event) => setNamingTemplate(sanitizeTemplateInput(event.target.value))}
-            />
-          </div>
-          <div className="flex items-center justify-between gap-4 rounded-md border px-3 py-2">
-            <p className="text-sm">{t('subscriptions.fields.onlyLatest')}</p>
-            <Switch checked={onlyLatest} onCheckedChange={setOnlyLatest} />
+          <div
+            data-state={advancedOptionsOpen ? 'open' : 'closed'}
+            className={cn(
+              'grid overflow-hidden transition-[grid-template-rows,opacity] duration-200 ease-out',
+              advancedOptionsOpen ? 'grid-rows-[1fr] opacity-100' : 'grid-rows-[0fr] opacity-0'
+            )}
+            aria-hidden={!advancedOptionsOpen}
+          >
+            <div className={cn('min-h-0', !advancedOptionsOpen && 'pointer-events-none')}>
+              <div className="space-y-3 border-t pt-4">
+                <div className="space-y-2">
+                  <Label>{t('subscriptions.fields.keywords')}</Label>
+                  <Input value={keywords} onChange={(event) => setKeywords(event.target.value)} />
+                </div>
+                <div className="space-y-2">
+                  <Label>{t('subscriptions.fields.tags')}</Label>
+                  <Input value={tags} onChange={(event) => setTags(event.target.value)} />
+                </div>
+                <div className="space-y-2">
+                  <Label>{t('subscriptions.fields.namingTemplate')}</Label>
+                  <Input
+                    value={namingTemplate}
+                    onChange={(event) =>
+                      setNamingTemplate(sanitizeTemplateInput(event.target.value))
+                    }
+                  />
+                </div>
+                <div className="flex items-center justify-between gap-4 rounded-md border px-3 py-2">
+                  <p className="text-sm">{t('subscriptions.fields.onlyLatest')}</p>
+                  <Switch checked={onlyLatest} onCheckedChange={setOnlyLatest} />
+                </div>
+              </div>
+            </div>
           </div>
         </div>
         <DialogFooter>
-          {mode === 'add' && (
-            <Button variant="outline" onClick={onClose}>
-              {t('download.cancel')}
-            </Button>
-          )}
-          <Button onClick={() => void handleSave()}>{t(saveButtonKey)}</Button>
+          <div className="flex items-center justify-between w-full gap-4">
+            <div className="flex items-center gap-2">
+              <Checkbox
+                id={advancedOptionsId}
+                checked={advancedOptionsOpen}
+                onCheckedChange={(checked) => setAdvancedOptionsOpen(checked === true)}
+              />
+              <Label htmlFor={advancedOptionsId} className="cursor-pointer">
+                {t('advancedOptions.title')}
+              </Label>
+            </div>
+            <div className="ml-auto flex gap-2">
+              {mode === 'add' && (
+                <Button variant="outline" onClick={onClose}>
+                  {t('download.cancel')}
+                </Button>
+              )}
+              <Button onClick={() => void handleSave()}>{t(saveButtonKey)}</Button>
+            </div>
+          </div>
         </DialogFooter>
       </DialogContent>
     </Dialog>

src/renderer/src/components/ui/button.tsx

@@ -8,10 +8,10 @@ const buttonVariants = cva(
   {
     variants: {
       variant: {
-        default: 'bg-primary text-primary-foreground shadow hover:bg-primary/90',
-        destructive: 'bg-destructive text-destructive-foreground shadow-sm hover:bg-destructive/90',
-        outline: 'border bg-background shadow-sm hover:bg-accent hover:text-accent-foreground',
-        secondary: 'bg-secondary text-secondary-foreground shadow-sm hover:bg-secondary/80',
+        default: 'bg-primary text-primary-foreground hover:bg-primary/90',
+        destructive: 'bg-destructive text-destructive-foreground hover:bg-destructive/90',
+        outline: 'border bg-background hover:bg-accent hover:text-accent-foreground',
+        secondary: 'bg-secondary text-secondary-foreground hover:bg-secondary/80',
         ghost: 'hover:bg-accent hover:text-accent-foreground',
         link: 'text-primary underline-offset-4 hover:underline'
       },